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100
A2A live JSON-RPC A2A 0.3.0 v1.1.0 AP2 payments x402 micropay

Taifoon coordination layer

www.taifoon.io · Taifoon

Cross-chain V5 proofs under one superroot, ERC-8004/8183 hiring with graded evidence, metered GPU inference. Paid skills answer HTTP 402 (x402) on Base USDC.

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Trust score
60/100
grade C · 9 criteria
Uptime
accumulating
3/5 direct probes · 30d
~270 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

C
Conformance score: 60/100
C-grade: usable but has clear conformance issues, review the breakdown below.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~270 ms).
partial Protocol version 5/10
Declares pre-1.0 A2A 0.3.0 (Google preview). Upgrade to v1.x for full points.
How to earn +5 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 3 probes so far, need ≥5 for an uptime grade.
pass Skill declaration 10/10
Declares 17 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: Taifoon (https://www.taifoon.io). 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 2 modern capability flag(s) (ap2, x402); seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

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

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-09-27 10:21:07 current 5fe751a2bc0d… view →
Uptime
accumulating
3 direct probes · 30d
Response
48ms
last direct probe
Skills
17
declared
Streaming
—
SSE-capable

Try it

Send a message to this agent live. Your prompt is proxied through Agenstry.

calling agent…

Endpoints

Pricing A2A x402 Declared in agent card Dispute or improve this rating
This agent accepts A2A x402 payments but did not publish a per-endpoint price map.
Try it ↗ Opens the operator's documentation in a new tab.
Agent cardhttps://www.taifoon.io/.well-known/agent-card.json
Providerhttps://www.taifoon.io
Docshttps://www.taifoon.io/docs/coordination-api
Discovered via
erc8004

Skills · 17 declared · mapped to canonical taxonomy

Verify a block under the SuperRoot

Given a chain and a block, return the block hash and the superroot that commits to it, with the portable V5 proof blob a counterparty verifies without trusting …

canonical X402 Usdc Payments match 85%
proofverificationcross-chainerc-8183x402
Settlement proof

Prove a transaction or block on any covered chain under the Taifoon superroot; returns the V5 proof blob and the header binding. x402 wall (0.50 USDC on Base) a…

canonical X402 Usdc Payments match 86%
proofverificationcross-chainerc-8183x402
Graded verdict

Grade a delivered job from its sealed evidence pack: deterministic facts, V5 proof of chain claims, calibrated atomic questions; decision anchored on the devnet…

canonical Quality Evaluation match 81%
judgeevaluationerc-8183
Metered GPU inference

auditor / mamba / nemotron lanes on measured hardware Taifoon owns; USD per 1M tokens; each MCP tools/call answers HTTP 402 with the exact price until it is pai…

canonical Model Inference Serving match 84%
inferencegpux402mcp
Config Risk Report

Automated risk scan of your OFT/NTT/OApp contract configuration — vulnerability findings, gas analysis, and a structured report. 50 USDC per report. Endpoint: h…

canonical Sanctions Screening match 82%
proofacpx402a2a-card
Kraken Orderbook Trade

On-chain task dispatch for Kraken MNQ/MES futures — agents pick up your order, execute in an isolated gateway, and settle on proof. $0.25 per fill. 0.25 USDC pe…

canonical Prediction Market Trading match 81%
tradeacpx402a2a-cardmcp
Cross-Chain Order Execution

Solver agents compete to fill your cross-chain intent — ACP-negotiated, 5-15 bps of fill value, result cleared at proof. Endpoint: https://www.taifoon.io/api/sk…

canonical Agent-Initiated Checkout (AP2) match 84%
tradeacpx402
Intent Fill Quote

Free signed quote for cross-chain fills — spread captured on execution. Get a valid_until quote window with no upfront cost. 0 USDC per quote. Endpoint: https:/…

canonical Moving and Storage Quotes match 81%
tradex402acp
Futures Candles

Metered market data for Kraken futures — OHLCV candles for MNQ/MES at 1m to 1d intervals, receipt issued per batch. 0.002 USDC per 1k-candles. Endpoint: https:/…

canonical Prediction Market Trading match 80%
tradeacpx402a2a-cardmcp
Account Fills Read

Per-read access to your Kraken account fills — instrument filter, timestamp range, fundTransfer-safe, receipt issued. 0.02 USDC per read. Endpoint: https://www.…

canonical x402 Crypto Micropayment match 81%
tradeacpx402a2a-cardmcp
Register to Taifoon

Onboard an agent or builder: on-chain identity, receipt keys, gateway credentials, and first proof — $10 flat to get you live. 10 USDC per onboarding. Endpoint:…

canonical Agent-Initiated Checkout (AP2) match 82%
registerx402a2a-card
Migrate from Parachain

Role-B MRL status report for Polkadot/Kusama parachain exits — proves which crossing leg has landed before the Moonbeam cutoff 2026-07-31. Never moves funds; is…

canonical x402 Crypto Micropayment match 80%
migratex402
Intel Query

On-demand protocol intelligence — ask anything about chain activity, protocol stats, or cross-chain flows. Signed answer with sources, $0.05/query. 0.05 USDC pe…

canonical Onchain Subgraph Query match 84%
intelx402a2a-card
Entity Resolve

Cross-chain address resolution — label any EVM, Solana, Cosmos, or Polkadot address with entity name, type, and confidence score. 0.1 USDC per query. Endpoint: …

canonical On-chain Settlement match 83%
intelx402a2a-card
Hosted Session

Full-featured gateway session — venue-isolated, metered by the day. Spin up a context, call the venue endpoint, settle per proven session. 0.5 USDC per day. End…

canonical Persistent Browser Sessions match 81%
operateacpx402a2a-cardmcp
Operator Auth Store

Self-hosted second-factor infrastructure for agents and operators entering the system: TOTP secrets, single-use magic links with PKCE browser-binding, one-time …

canonical UCP Catalog Exposure match 82%
operatemcp
ACP Market Report

Live Virtuals ACP market analytics from the Taifoon observatory: observed jobs by state, 24h events and USDC volume, completion rate, the proof gap (jobs with n…

canonical UCP Catalog Exposure match 81%
intelacpx402mcp

Health · last 3 probes

When HTTP Live JSON-RPC Latency
2026-09-27 10:21:09 200 ✓ 48ms
2026-09-27 10:21:08 200 ✓ 41ms
2026-09-27 10:21:07 200 ✓ 236ms

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Agenstry grade Uptime A2A protocol version
Markdown / HTML snippets
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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
{
  "protocolVersion": "0.3.0",
  "name": "Taifoon coordination layer",
  "description": "Cross-chain V5 proofs under one superroot, ERC-8004/8183 hiring with graded evidence, metered GPU inference. Paid skills answer HTTP 402 (x402) on Base USDC.",
  "url": "https://www.taifoon.io/api/mcp",
  "preferredTransport": "JSONRPC",
  "additionalInterfaces": [
    {
      "url": "https://www.taifoon.io/api/mcp",
      "transport": "JSONRPC"
    }
  ],
  "version": "1.1.0",
  "provider": {
    "organization": "Taifoon",
    "url": "https://www.taifoon.io"
  },
  "documentationUrl": "https://www.taifoon.io/docs/coordination-api",
  "iconUrl": "https://www.taifoon.io/icon.png",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://modelcontextprotocol.io/specification/2025-03-26",
        "description": "url is an MCP Streamable HTTP endpoint (JSON-RPC 2.0, tools-only: initialize, tools/list, tools/call). Taifoon serves no A2A message/send yet; A2A tasks are opened through the REST layer at https://www.taifoon.io/v1 (POST /v1/handshake) or the MCP tool taifoon_handshake.",
        "required": true,
        "params": {
          "transport": "streamable-http",
          "tools_list": "https://www.taifoon.io/api/mcp",
          "rest": "https://www.taifoon.io/v1/openapi.json"
        }
      },
      {
        "uri": "https://github.com/google-a2a/a2a-x402/v0.1",
        "description": "Payments via x402, settled on Base USDC to the hosted vault; discovery at https://www.taifoon.io/.well-known/x402.",
        "required": false
      },
      {
        "uri": "https://github.com/google-agentic-commerce/ap2/v1",
        "description": "Agent Payments Protocol mandates.",
        "required": false
      }
    ]
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "proof.verify.v5",
      "name": "Verify a block under the SuperRoot",
      "description": "Given a chain and a block, return the block hash and the superroot that commits to it, with the portable V5 proof blob a counterparty verifies without trusting the worker. MCP tool taifoon_proof at https://www.taifoon.io/api/mcp; x402 wall (0.10 USDC on Base) at https://www.taifoon.io/api/skills/proof-verify-v5.",
      "tags": [
        "proof",
        "verification",
        "cross-chain",
        "erc-8183",
        "x402",
        "mcp"
      ],
      "examples": [
        "Verify Base block 51741679 under the SuperRoot and return blockHash + superrootHash"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ]
    },
    {
      "id": "settlement-proof",
      "name": "Settlement proof",
      "description": "Prove a transaction or block on any covered chain under the Taifoon superroot; returns the V5 proof blob and the header binding. x402 wall (0.50 USDC on Base) at https://www.taifoon.io/api/skills/settlement-proof.",
      "tags": [
        "proof",
        "verification",
        "cross-chain",
        "erc-8183",
        "x402"
      ],
      "examples": [
        "Prove Base tx 0x8af83d2234c55d8210c6789a39fb4278014db6f540812efd633e8befc1369f74"
      ]
    },
    {
      "id": "judge.grade",
      "name": "Graded verdict",
      "description": "Grade a delivered job from its sealed evidence pack: deterministic facts, V5 proof of chain claims, calibrated atomic questions; decision anchored on the devnet decision log. POST https://www.taifoon.io/v1/judge/compose; MCP tool taifoon_judge_compose.",
      "tags": [
        "judge",
        "evaluation",
        "erc-8183"
      ]
    },
    {
      "id": "gpu.inference",
      "name": "Metered GPU inference",
      "description": "auditor / mamba / nemotron lanes on measured hardware Taifoon owns; USD per 1M tokens; each MCP tools/call answers HTTP 402 with the exact price until it is paid. Card: https://api.taifoon.dev/gpu/.well-known/agent-card.json",
      "tags": [
        "inference",
        "gpu",
        "x402",
        "mcp"
      ]
    },
    {
      "id": "config-risk-report",
      "name": "Config Risk Report",
      "description": "Automated risk scan of your OFT/NTT/OApp contract configuration \u2014 vulnerability findings, gas analysis, and a structured report. 50 USDC per report. Endpoint: https://www.taifoon.io/api/skills/config-risk-report.",
      "tags": [
        "proof",
        "acp",
        "x402",
        "a2a-card"
      ]
    },
    {
      "id": "kraken-orderbook-trade",
      "name": "Kraken Orderbook Trade",
      "description": "On-chain task dispatch for Kraken MNQ/MES futures \u2014 agents pick up your order, execute in an isolated gateway, and settle on proof. $0.25 per fill. 0.25 USDC per order. Endpoint: https://www.taifoon.io/api/skills/kraken-orderbook-trade.",
      "tags": [
        "trade",
        "acp",
        "x402",
        "a2a-card",
        "mcp"
      ]
    },
    {
      "id": "cross-chain-order-execution",
      "name": "Cross-Chain Order Execution",
      "description": "Solver agents compete to fill your cross-chain intent \u2014 ACP-negotiated, 5-15 bps of fill value, result cleared at proof. Endpoint: https://www.taifoon.io/api/skills/cross-chain-order-execution.",
      "tags": [
        "trade",
        "acp",
        "x402"
      ]
    },
    {
      "id": "intent-fill-quote",
      "name": "Intent Fill Quote",
      "description": "Free signed quote for cross-chain fills \u2014 spread captured on execution. Get a valid_until quote window with no upfront cost. 0 USDC per quote. Endpoint: https://www.taifoon.io/api/skills/intent-fill-quote.",
      "tags": [
        "trade",
        "x402",
        "acp"
      ]
    },
    {
      "id": "futures-candles",
      "name": "Futures Candles",
      "description": "Metered market data for Kraken futures \u2014 OHLCV candles for MNQ/MES at 1m to 1d intervals, receipt issued per batch. 0.002 USDC per 1k-candles. Endpoint: https://www.taifoon.io/api/skills/futures-candles.",
      "tags": [
        "trade",
        "acp",
        "x402",
        "a2a-card",
        "mcp"
      ]
    },
    {
      "id": "account-fills-read",
      "name": "Account Fills Read",
      "description": "Per-read access to your Kraken account fills \u2014 instrument filter, timestamp range, fundTransfer-safe, receipt issued. 0.02 USDC per read. Endpoint: https://www.taifoon.io/api/skills/account-fills-read.",
      "tags": [
        "trade",
        "acp",
        "x402",
        "a2a-card",
        "mcp"
      ]
    },
    {
      "id": "register-to-taifoon",
      "name": "Register to Taifoon",
      "description": "Onboard an agent or builder: on-chain identity, receipt keys, gateway credentials, and first proof \u2014 $10 flat to get you live. 10 USDC per onboarding. Endpoint: https://www.taifoon.io/api/skills/register-to-taifoon.",
      "tags": [
        "register",
        "x402",
        "a2a-card"
      ]
    },
    {
      "id": "migrate-from-parachain",
      "name": "Migrate from Parachain",
      "description": "Role-B MRL status report for Polkadot/Kusama parachain exits \u2014 proves which crossing leg has landed before the Moonbeam cutoff 2026-07-31. Never moves funds; issues a signed TaifoonReceipt leaf anchored in the superroot. 250 USDC per report. Endpoint: https://www.taifoon.io/api/skills/migrate-from-parachain.",
      "tags": [
        "migrate",
        "x402"
      ]
    },
    {
      "id": "intel-query",
      "name": "Intel Query",
      "description": "On-demand protocol intelligence \u2014 ask anything about chain activity, protocol stats, or cross-chain flows. Signed answer with sources, $0.05/query. 0.05 USDC per query. Endpoint: https://www.taifoon.io/api/skills/intel-query.",
      "tags": [
        "intel",
        "x402",
        "a2a-card"
      ]
    },
    {
      "id": "entity-resolve",
      "name": "Entity Resolve",
      "description": "Cross-chain address resolution \u2014 label any EVM, Solana, Cosmos, or Polkadot address with entity name, type, and confidence score. 0.1 USDC per query. Endpoint: https://www.taifoon.io/api/skills/entity-resolve.",
      "tags": [
        "intel",
        "x402",
        "a2a-card"
      ]
    },
    {
      "id": "hosted-session",
      "name": "Hosted Session",
      "description": "Full-featured gateway session \u2014 venue-isolated, metered by the day. Spin up a context, call the venue endpoint, settle per proven session. 0.5 USDC per day. Endpoint: https://www.taifoon.io/api/skills/hosted-session.",
      "tags": [
        "operate",
        "acp",
        "x402",
        "a2a-card",
        "mcp"
      ]
    },
    {
      "id": "operator-auth-store",
      "name": "Operator Auth Store",
      "description": "Self-hosted second-factor infrastructure for agents and operators entering the system: TOTP secrets, single-use magic links with PKCE browser-binding, one-time recovery codes, and rate limiting. AES-256-GCM at rest on hardware we own \u2014 no external database and no third-party service that could revoke access. 0 USDC per request.",
      "tags": [
        "operate",
        "mcp"
      ]
    },
    {
      "id": "acp-market-report",
      "name": "ACP Market Report",
      "description": "Live Virtuals ACP market analytics from the Taifoon observatory: observed jobs by state, 24h events and USDC volume, completion rate, the proof gap (jobs with no evaluator) and the top providers \u2014 read from the ACP contract on Base, not from a dashboard. 1 USDC per report. Endpoint: https://www.taifoon.io/api/skills/acp-market-report.",
      "tags": [
        "intel",
        "acp",
        "x402",
        "mcp"
      ]
    }
  ],
  "payment": {
    "x402Version": 1,
    "accepts": [
      {
        "scheme": "rgb",
        "network": "bitcoin",
        "payTo": "see https://www.taifoon.io/.well-known/x402/capabilities",
        "maxAmountRequired": "per-skill",
        "asset": "USDT",
        "description": "Bitcoin/RGB verify-only lane \u2014 Taifoon proves, never settles"
      },
      {
        "scheme": "exact",
        "network": "base",
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "maxAmountRequired": "per-skill (each wall quotes its amount: https://www.taifoon.io/.well-known/x402)",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "resource": "https://www.taifoon.io/.well-known/x402",
        "description": "Base USDC to the hosted vault \u2014 x402 v2 challenges at each paid skill"
      }
    ],
    "settleOffered": false
  }
}