Feature: Wallet reputation scoring for x402 payment verification #37

Open
Open
Feature: Wallet reputation scoring for x402 payment verification#37

Description

@jacobsd32-cpu
jacobsd32-cpu
opened on Feb 26, 2026

Context

MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.

Proposal

Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).

How It Would Work

Before settling a payment, MCPay could optionally check the payer's reputation:

constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}

This could be:

  • A configurable middleware in the payment pipeline
  • An optional flag in the facilitator config
  • A standalone verification step

Resources

  • Live API: https://djd-agent-score.fly.dev
  • npm SDK: @anthropic-djd/agent-score-sdk
  • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
  • No API key required for basic scoring

Happy to collaborate on the integration if there's interest.

Metadata

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No one assigned

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      No milestone

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      None yet

      Development

      No branches or pull requests

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      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      Feature: Wallet reputation scoring for x402 payment verification #37
      Open
      Open
      Feature: Wallet reputation scoring for x402 payment verification#37
      Description
      @jacobsd32-cpu
      jacobsd32-cpu
      opened on Feb 26, 2026
      Context
      MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
      Proposal
      Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
      How It Would Work
      Before settling a payment, MCPay could optionally check the payer's reputation:
      constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
      This could be:
      • A configurable middleware in the payment pipeline
      • An optional flag in the facilitator config
      • A standalone verification step
      Resources
      • Live API: https://djd-agent-score.fly.dev
      • npm SDK: @anthropic-djd/agent-score-sdk
      • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
      • No API key required for basic scoring
      Happy to collaborate on the integration if there's interest.
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        No labels
        No labels
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          Feature: Wallet reputation scoring for x402 payment verification #37
          Open
          Open
          Feature: Wallet reputation scoring for x402 payment verification#37
          Description
          @jacobsd32-cpu
          jacobsd32-cpu
          opened on Feb 26, 2026
          Context
          MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
          Proposal
          Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
          How It Would Work
          Before settling a payment, MCPay could optionally check the payer's reputation:
          constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
          This could be:
          • A configurable middleware in the payment pipeline
          • An optional flag in the facilitator config
          • A standalone verification step
          Resources
          • Live API: https://djd-agent-score.fly.dev
          • npm SDK: @anthropic-djd/agent-score-sdk
          • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
          • No API key required for basic scoring
          Happy to collaborate on the integration if there's interest.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              Feature: Wallet reputation scoring for x402 payment verification #37
              Open
              Open
              Feature: Wallet reputation scoring for x402 payment verification#37
              Description
              @jacobsd32-cpu
              jacobsd32-cpu
              opened on Feb 26, 2026
              Context
              MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
              Proposal
              Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
              How It Would Work
              Before settling a payment, MCPay could optionally check the payer's reputation:
              constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
              This could be:
              • A configurable middleware in the payment pipeline
              • An optional flag in the facilitator config
              • A standalone verification step
              Resources
              • Live API: https://djd-agent-score.fly.dev
              • npm SDK: @anthropic-djd/agent-score-sdk
              • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
              • No API key required for basic scoring
              Happy to collaborate on the integration if there's interest.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                No labels
                No labels
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  Feature: Wallet reputation scoring for x402 payment verification #37
                  Open
                  Open
                  Feature: Wallet reputation scoring for x402 payment verification#37
                  Description
                  @jacobsd32-cpu
                  jacobsd32-cpu
                  opened on Feb 26, 2026
                  Context
                  MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
                  Proposal
                  Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
                  How It Would Work
                  Before settling a payment, MCPay could optionally check the payer's reputation:
                  constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
                  This could be:
                  • A configurable middleware in the payment pipeline
                  • An optional flag in the facilitator config
                  • A standalone verification step
                  Resources
                  • Live API: https://djd-agent-score.fly.dev
                  • npm SDK: @anthropic-djd/agent-score-sdk
                  • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
                  • No API key required for basic scoring
                  Happy to collaborate on the integration if there's interest.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      Feature: Wallet reputation scoring for x402 payment verification #37
                      Open
                      Open
                      Feature: Wallet reputation scoring for x402 payment verification#37
                      Description
                      @jacobsd32-cpu
                      jacobsd32-cpu
                      opened on Feb 26, 2026
                      Context
                      MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
                      Proposal
                      Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
                      How It Would Work
                      Before settling a payment, MCPay could optionally check the payer's reputation:
                      constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
                      This could be:
                      • A configurable middleware in the payment pipeline
                      • An optional flag in the facilitator config
                      • A standalone verification step
                      Resources
                      • Live API: https://djd-agent-score.fly.dev
                      • npm SDK: @anthropic-djd/agent-score-sdk
                      • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
                      • No API key required for basic scoring
                      Happy to collaborate on the integration if there's interest.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          Feature: Wallet reputation scoring for x402 payment verification #37
                          Open
                          Open
                          Feature: Wallet reputation scoring for x402 payment verification#37
                          Description
                          @jacobsd32-cpu
                          jacobsd32-cpu
                          opened on Feb 26, 2026
                          Context
                          MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
                          Proposal
                          Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
                          How It Would Work
                          Before settling a payment, MCPay could optionally check the payer's reputation:
                          constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
                          This could be:
                          • A configurable middleware in the payment pipeline
                          • An optional flag in the facilitator config
                          • A standalone verification step
                          Resources
                          • Live API: https://djd-agent-score.fly.dev
                          • npm SDK: @anthropic-djd/agent-score-sdk
                          • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
                          • No API key required for basic scoring
                          Happy to collaborate on the integration if there's interest.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                              Skip to content
                              Feature: Wallet reputation scoring for x402 payment verification #37
                              Open
                              Open
                              Feature: Wallet reputation scoring for x402 payment verification#37
                              Description
                              @jacobsd32-cpu
                              jacobsd32-cpu
                              opened on Feb 26, 2026
                              Context
                              MCPay handles MCP and x402 payment infrastructure. One missing piece in the payment flow is trust — when an MCP server receives a payment from an unknown wallet, there's no way to assess whether that wallet has a legitimate transaction history or is potentially fraudulent.
                              Proposal
                              Integrate DJD AgentScore to add optional reputation checks to the payment verification flow. AgentScore provides a 0–100 trust score for Base wallets, derived from on-chain x402 settlement history across 5 dimensions (identity, behavior, reliability, viability, capability).
                              How It Would Work
                              Before settling a payment, MCPay could optionally check the payer's reputation:
                              constresp=awaitfetch(`https://djd-agent-score.fly.dev/v1/score/basic?wallet=${payerWallet}`)const{ composite, tier, recommendation }=awaitresp.json()// recommendation is one of: TRUST, PROCEED_WITH_CAUTION, REVIEW_REQUIRED, BLOCKif(recommendation==='BLOCK'){return{status: 402,error: 'Payment rejected — wallet has low trust score'}}
                              This could be:
                              • A configurable middleware in the payment pipeline
                              • An optional flag in the facilitator config
                              • A standalone verification step
                              Resources
                              • Live API: https://djd-agent-score.fly.dev
                              • npm SDK: @anthropic-djd/agent-score-sdk
                              • MCP Server: Available on Smithery (so MCPay could even consume it as an MCP tool)
                              • No API key required for basic scoring
                              Happy to collaborate on the integration if there's interest.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions