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📊 Intel view 📋 Audit JSON 🔄 Changelog
75
A2A signed v1.0.0 x402 micropay

AlgoVoi Payment Agent

algovoi.co.uk · AlgoVoi

Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google Agentic Payments) protocols.

🛡
Own this agent?
Verify the domain algovoi.co.uk via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
Verify ownership
🔔 Watch this agent for changes. Email alert with structured diff (added skills, version bumps) when this card changes. Enterprise feature. Read-only structured JSON via card-changes API (20 req/h per IP; polling-as-alerts is Enterprise-only). Sign in to subscribe
Trust score
51/100
grade D · 9 criteria
Uptime
95.8%
237 probes
~95 ms response
Revenue · 30d
no payment wallet declared
Usage · 7d
0
no recent activity
Card drift · 7d
stable
6 snapshots tracked
Owner
unverified
claim this listing →
D
Conformance score: 51/100
D-grade: significant issues, auth-gated, partially broken, or stale.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Schema-validated A2A AgentCard returned by the well-known endpoint.
fail Live JSON-RPC 0/25
Card declares a URL but that URL returns 404.
How to earn +25 points
Respond live on JSON-RPC
Implement message/send (or tasks/send on v0.x). Return a 200 with a valid JSON-RPC response. Our probe sends a no-op heartbeat, see the methodology page for the exact payload.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to the AgentCard root. Without it, callers can't negotiate v0.x vs v1.0 compatibility.
Docs →
partial JWS signature 5/10
Card has a signatures[] entry but we haven't verified it.
How to earn +5 points
Sign your AgentCard with JWS
Add a `signatures` array to the card body following RFC 7515. Publish the public JWKS at /.well-known/jwks.json. Sign with ES256 (recommended) or RS256.
Docs →
pass Uptime track record 14/15
227/237 probes succeeded (96% uptime).
pass Skill declaration 10/10
Declares 5 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: AlgoVoi (https://algovoi.co.uk). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass Freshness + modern flags 5/5
declares 1 modern capability flag(s) (x402); seen in upstream source within 0d
partial Security declaration 2/5
Declares 1 security scheme(s) but none use PKCE or mTLS.
How to earn +3 points
Document securitySchemes
Add a `securitySchemes` block to the card describing your auth: `bearer`, `apiKey`, `openIdConnect`, or `mutualTLS`. Routers refuse to call agents that declare no auth model.
Docs →

Activity (audit trail)

last 24h · 0 calls Public aggregate · no PII recorded

No calls observed in the last 7 days. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

6 snapshots drifted 5× Every change to agent-card.json
Captured Hash
2026-07-03 04:30:09 current c7d504601a07… view →
2026-06-06 03:56:35 0e6c04d56a3b… view →
2026-06-04 21:23:51 b33c39caf4d0… view →
2026-05-29 03:05:13 030e01d52700… view →
2026-05-18 19:24:59 956b7d503b85… view →
2026-05-15 06:56:32 030e01d52700… view →
Uptime
95.8%
237 probes
Response
89ms
last probe
Skills
5
declared
Streaming
SSE-capable

Endpoints

Agent cardhttps://algovoi.co.uk/.well-known/agent.json
Providerhttps://algovoi.co.uk
About this provider off-card enrichment
SSL certificate
Let's Encrypt
expires 2026-09-05
Discovered via
lists recrawl_hot recrawl_warm

Skills · 5 declared · mapped to canonical taxonomy

Verify On-Chain Payment

Verify that a blockchain transaction satisfies the payment requirements for a gated resource. Supports x402, MPP, and AP2 protocols on Algorand, VOI, Hedera, St…

canonical X402 Usdc Payments match 90%
paymentblockchainverificationx402mpp
Create Hosted Checkout

Create a hosted payment link for a given amount. Returns a checkout URL and token that an end-user can open to complete payment. Input: amount (major fiat units…

canonical Agent-Initiated Checkout (AP2) match 83%
paymentcheckouthostedpayment-link
Check Payment Status

Poll the payment status of a checkout link. Input: token (the URL slug from create-checkout, e.g. 'uW9MJN-abc123' — NOT the UUID id field). Returns status: acti…

canonical Agent-Initiated Checkout (AP2) match 83%
paymentstatuspolling
Post Twitter Checkout

Create a hosted checkout link and post it as a reply to a tweet (or as a new tweet) using the tenant's connected X bot credentials. Input: amount (major fiat un…

canonical Agent-Initiated Checkout (AP2) match 84%
paymentcheckouttwitterxsocial
Agent Trust Bench

Research environment measuring autonomous AI agent payment decisions under x402. 35 profiles spanning benign, adversarial, multi-turn, and budget-enforcement sc…

canonical x402 Crypto Micropayment match 84%
researchx402agent-safetybenchmarkmcp

Health · last 30 probes

When HTTP Live JSON-RPC Latency
2026-07-19 04:40:46 200 89ms
2026-07-18 17:09:22 200 97ms
2026-07-18 04:44:56 200 144ms
2026-07-17 19:49:46 200 138ms
2026-07-17 13:39:03 200 126ms
2026-07-17 07:00:23 200 118ms
2026-07-17 00:48:20 200 115ms
2026-07-16 18:53:27 200 144ms
2026-07-16 12:59:11 200 178ms
2026-07-16 06:25:19 200 151ms

Cheaper or better alternatives per-skill

↑ 3 higher quality

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

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Embed your Agenstry badge

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Agenstry grade Uptime
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/algovoi.co.uk.svg)](https://agenstry.com/agents/algovoi.co.uk)
[![Verified Business](https://agenstry.com/badge/algovoi.co.uk/identity.svg)](https://agenstry.com/agents/algovoi.co.uk)
[![Uptime](https://agenstry.com/badge/algovoi.co.uk/uptime.svg)](https://agenstry.com/agents/algovoi.co.uk)
[![A2A version](https://agenstry.com/badge/algovoi.co.uk/protocol.svg)](https://agenstry.com/agents/algovoi.co.uk)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "name": "AlgoVoi Payment Agent",
  "description": "Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google Agentic Payments) protocols.",
  "url": "https://api.algovoi.co.uk",
  "version": "1.0.0",
  "provider": {
    "organization": "AlgoVoi",
    "url": "https://algovoi.co.uk"
  },
  "iconUrl": "https://algovoi.co.uk/favicon.ico",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://api.algovoi.co.uk/ext/scoped-authorization-receipts/v1",
        "description": "Issues and verifies scoped authorization (compliance) receipts for high-impact payment actions. Each receipt binds a closed categorical outcome to the action, resource, request digest, issuing provider DID, and issuance time, signed for offline verification against the published JWKS.",
        "required": false,
        "params": {
          "role": "issuer-verifier",
          "authority_manifest_uri": "https://api.algovoi.co.uk/.well-known/did.json",
          "receipt_issued_for": [
            "payment.authorize",
            "payment.settle",
            "compliance.screen"
          ],
          "receipt_transport": {
            "type": "response_body",
            "field": "compliance_receipt"
          },
          "receipt_binds": [
            "agent_id",
            "action",
            "resource",
            "request_digest",
            "provider_did",
            "issued_at",
            "jurisdiction"
          ],
          "receipt_outcomes": [
            "ALLOW",
            "REFER",
            "DENY"
          ],
          "receipt_verification": {
            "format": "JWS",
            "algorithms": [
              "EdDSA"
            ],
            "jwks_uri": "https://api.algovoi.co.uk/.well-known/jwks.json"
          },
          "receipt_profile_uri": "https://api.algovoi.co.uk/compliance/attestation"
        }
      }
    ]
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "securitySchemes": {
    "apiKey": {
      "type": "apiKey",
      "in": "header",
      "name": "Authorization",
      "description": "Bearer <tenant_api_key>. Obtain via api.algovoi.co.uk/signup"
    }
  },
  "security": [
    {
      "apiKey": []
    }
  ],
  "trust": {
    "signals": [
      {
        "signal_type": "behavioral_attestation",
        "provider": "did:web:agent-trust-bench.algovoi.co.uk",
        "evidence_type": "signed_behavioral_credential",
        "credential_header": "X-ATB-ZK-Credential",
        "freshness_ttl_seconds": 2592000,
        "verifiable_offline": true,
        "verification_endpoint": "https://agent-trust-bench.algovoi.co.uk/agent-trust-bench/.well-known/atb-keys.json",
        "descriptor_url": "https://agent-trust-bench.algovoi.co.uk/.well-known/a2a-trust-signal.json"
      }
    ]
  },
  "skills": [
    {
      "id": "verify-payment",
      "name": "Verify On-Chain Payment",
      "description": "Verify that a blockchain transaction satisfies the payment requirements for a gated resource. Supports x402, MPP, and AP2 protocols on Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, and ARC networks. Returns verified=true and an access_token JWT on success.",
      "tags": [
        "payment",
        "blockchain",
        "verification",
        "x402",
        "mpp",
        "ap2"
      ],
      "examples": [
        "Verify tx ABC123 on algorand_mainnet for resource premium-content",
        "Check if payment has been received for checkout token chk_xyz"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "create-checkout",
      "name": "Create Hosted Checkout",
      "description": "Create a hosted payment link for a given amount. Returns a checkout URL and token that an end-user can open to complete payment. Input: amount (major fiat units, e.g. 9.99), currency (ISO 4217, e.g. GBP), label (description), preferred_network (optional), redirect_url (optional). Supported networks: algorand_mainnet, voi_mainnet, hedera_mainnet, stellar_mainnet, base_mainnet, solana_mainnet, tempo_mainnet, arc_testnet.",
      "tags": [
        "payment",
        "checkout",
        "hosted",
        "payment-link"
      ],
      "examples": [
        "Create a checkout link for \u00a39.99 (amount: 9.99, currency: GBP)",
        "Create a checkout link for $49.00 on Algorand mainnet"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "check-status",
      "name": "Check Payment Status",
      "description": "Poll the payment status of a checkout link. Input: token (the URL slug from create-checkout, e.g. 'uW9MJN-abc123' \u2014 NOT the UUID id field). Returns status: active | paid | expired | cancelled.",
      "tags": [
        "payment",
        "status",
        "polling"
      ],
      "examples": [
        "Check if checkout uW9MJN-abc123 has been paid"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "post-twitter-checkout",
      "name": "Post Twitter Checkout",
      "description": "Create a hosted checkout link and post it as a reply to a tweet (or as a new tweet) using the tenant's connected X bot credentials. Input: amount (major fiat units), currency (ISO 4217), tweet_id (optional \u2014 reply target), label (optional), preferred_network (optional). Returns checkout_url, token, and tweet_id of the posted reply.",
      "tags": [
        "payment",
        "checkout",
        "twitter",
        "x",
        "social"
      ],
      "examples": [
        "Reply to tweet 1234567890 with a \u00a39.99 checkout link",
        "Post a $50 payment request as a new tweet via the connected X bot"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "agent-trust-bench",
      "name": "Agent Trust Bench",
      "description": "Research environment measuring autonomous AI agent payment decisions under x402. 35 profiles spanning benign, adversarial, multi-turn, and budget-enforcement scenarios. Agents can probe profiles via GET /{profile_id}, refuse via POST /refused/{profile_id}, and declare pre-authorisation via POST /authorised-declaration. Available as an MCP server (bench_mcp_server.py, stdio transport) and via Bazaar discovery at /discovery/resources. Max transaction: $1.00 USDC. No auth required. Research disclosure at /disclosure-policy.",
      "tags": [
        "research",
        "x402",
        "agent-safety",
        "benchmark",
        "mcp"
      ],
      "examples": [
        "List all bench profiles at agent-trust-bench.algovoi.co.uk/discovery/resources",
        "Probe the 'cheap' profile: GET agent-trust-bench.algovoi.co.uk/cheap",
        "Run all 35 profiles with bench_runner.py --persona policy"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    }
  ],
  "resources": [
    {
      "id": "agent-trust-bench-discovery",
      "name": "Agent Trust Bench \u2014 Bazaar Discovery",
      "url": "https://agent-trust-bench.algovoi.co.uk/discovery/resources",
      "description": "Bazaar-schema catalog of all 35 bench profiles with x402 payment details."
    },
    {
      "id": "agent-trust-bench-x402-well-known",
      "name": "Agent Trust Bench \u2014 x402 Discovery",
      "url": "https://agent-trust-bench.algovoi.co.uk/.well-known/x402.json",
      "description": "x402 discovery document including MCP server configuration."
    }
  ],
  "signatures": [
    {
      "protected": "eyJhbGciOiJFZERTQSIsImprdSI6Imh0dHBzOi8vYXBpLmFsZ292b2kuY28udWsvLndlbGwta25vd24vandrcy5qc29uIiwia2lkIjoiZDA0ODFkZjRjYmJkYThlOGFiYTg2NzA5NDE5ODg0ZWYiLCJ0eXAiOiJKT1NFIn0",
      "signature": "uJ87-a88-mWrnN4PMo-33NYYjFvsAqaB9mB_dkKyTewHp07LuX2aJJhS5UVzDFEkDOYqD73GJsjIHwQf2ulhDg"
    }
  ]
}