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📊 Intel view 📋 Audit JSON 🔄 Changelog
100
💰 Paid API ai

attester.dev

attester.dev · attester.dev

Independent verification of agent work products: citation-support checks and data/schema validation returning wallet-signed attestations (EIP-191), plus cited coding research that ships pre-verified with a signed attestation over its citations. Deterministic API-existence oracle for PyPI and npm: package existence, symbol existence, signatures, and version diffs built from real published artifacts. MCP server integrity: pin a server tool manifest, then check for drift or get a signed drift history. USDC on Base mainnet via CDP facilitator. Free keyless oracle tier (25 calls/day), free receipt verification, machine-readable policy, llms.txt + OpenAPI.

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Verify the domain attester.dev 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.
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🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch
Our probe of this card is currently failing
Last probe error: gate: missing url
Last attempt: 2026-09-16 12:21 Last success: 2026-09-16 Status: 200
1 thing in this card we could not use
Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://attester.dev/.well-known/agent.json and the next probe clears this panel.
Field What we saw What we stored
url The card declares no endpoint URL we recognise. A2A v1.0 puts it in supportedInterfaces[].url; v0.x used a top-level url. Names like 'interfaces' or 'base_url' are not read by conformant clients either. dropped — we read the card but cannot list this agent as callable
Trust score
33/100
grade F · 9 criteria
Uptime
0.0%
44 direct probes · 30d
Observed inflow · 30d
$0.86
15 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 33/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾ click to collapse breakdown ▴
partial Valid AgentCard 9/10
AgentCard did not read cleanly: 1 field we could not read. Scored on what we could read, not on a card that arrived as published — the card findings name every affected field and what we did with it.
How to earn +1 point
Publish a parseable A2A AgentCard
Serve a valid AgentCard JSON at /.well-known/agent-card.json. The A2A 1.0 schema is the reference; we accept the v0.x backwards-compatible variant too.
Docs →
partial Live JSON-RPC 15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` 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).
fail Uptime track record 0/15
0/44 probes succeeded (0% uptime).
How to earn +15 points
Stabilise uptime
We probe every agent on a tiered schedule and grade the last 30 days. Sustained 99 %+ uptime over 20+ conclusive probes scores full points. Probes you refuse us (HTTP 429/403, a WAF challenge, robots.txt) no longer count against you either way, so what is left is genuine unavailability — usually a transient 5xx on cold start.
Docs →
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: attester.dev (https://attester.dev). 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 4/5
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.

Uptime
0.0%
44 direct probes · 30d
Response
103ms
last direct probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 on Base USDC Declared in agent card Dispute or improve this rating
This agent accepts x402 payments but did not publish a per-endpoint price map.
Try it ↗ Opens the operator's playground / docs in a new tab.
Settlement wallet: 0x57407d691f755caa107647718f3582a8a87467dd · basescan ↗
Observed on-chain inflow verified on-chain
Last 7d
$0.00
0 calls
Last 30d
$0.86
15 calls
USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history ~ flat (+0.0%)
2026-08-07 2026-09-16
Peak day: $0.86 Data points: 40 Total tx (30d window): 15
Payment authenticity evidence confidence How we measure this →
single_payer_observed 2/5

Payer identities observed; a single payer accounts for effectively all observed volume.

Assessed window
30d
1 active of 6 observed
Inflow assessed
$0.86
15 transactions
Payer identities
available
2 evidence caveats
single_day_concentration — Most observed volume landed on a single day of the window.
Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-08-31.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid get_agent_full and payment_intelligence skills on REST, A2A and MCP. API docs →
Agent cardhttps://attester.dev/.well-known/agent.json
Providerhttps://attester.dev
Docshttps://attester.dev/verify
Discovered via
cdp_discovery mcp_registry agentic_market recrawl_warm x402_list

Health · last 10 probes

When HTTP Live JSON-RPC Latency
2026-08-25 01:57:25 200 — 103ms
2026-08-23 22:45:10 200 — 119ms
2026-08-23 02:10:40 200 — 97ms
2026-08-22 00:57:24 200 — 95ms
2026-08-20 01:38:23 200 — 98ms
2026-08-19 08:12:29 200 — 95ms
2026-08-19 02:11:52 200 — 95ms
2026-08-18 19:49:22 200 — 95ms
2026-08-18 08:09:02 200 — 116ms
2026-08-18 00:36:31 200 — 110ms

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

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 
{
  "_source": "agentic.market",
  "service": {
    "id": "attester-dev",
    "name": "attester.dev",
    "description": "",
    "domain": "attester.dev",
    "provider": "attester.dev",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://attester.dev/judge",
        "description": "QA Judge: grade an agent output against your rubric (structure, citations, claim support, length constraints) and receive a 0-100 score with a signed attestation. $0.10 USDC per grading.",
        "pricing": {
          "amount": "0.1",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "output",
            "type": "string",
            "description": "",
            "example": "Use stream=True and iterate response.iter_text().",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "rubric",
            "type": "array",
            "description": "",
            "example": [],
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "QA Judge",
        "tags": [
          "qa",
          "evaluation",
          "rubric",
          "grading",
          "agents"
        ],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://attester.dev/spend-check",
        "description": "Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "amount_usd",
            "type": "number",
            "description": "",
            "example": 0.25,
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "payTo",
            "type": "string",
            "description": "",
            "example": "attester.dev",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Spend Check",
        "tags": [
          "risk",
          "counterparty",
          "payments",
          "x402",
          "agents"
        ],
        "quality": null
      },
      {
        "url": "https://attester.dev/v1/package/exists",
        "description": "Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answers and typosquat-adjacency flags carry signed proof. $0.002 USDC per check.",
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "ecosystem",
            "type": "string",
            "description": "",
            "example": "pypi",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "name",
            "type": "string",
            "description": "",
            "example": "requests",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "API-existence Oracle: package",
        "tags": [
          "oracle",
          "packages",
          "hallucination-check",
          "x402",
          "agents"
        ],
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "3"
        }
      },
      {
        "url": "https://attester.dev/v1/symbol/exists",
        "description": "Deterministic symbol existence for PyPI and npm packages: functions, classes, methods, constants with signatures and deprecation flags, extracted from real artifacts. Negative answers include closest matches and signed proof. $0.005 USDC per check.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "ecosystem",
            "type": "string",
            "description": "",
            "example": "pypi",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "package",
            "type": "string",
            "description": "",
            "example": "requests",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "symbol",
            "type": "string",
            "description": "",
            "example": "get",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "API-existence Oracle: symbol",
        "tags": [
          "oracle",
          "symbols",
          "hallucination-check",
          "x402",
          "agents"
        ],
        "quality": null
      },
      {
        "url": "https://attester.dev/v1/symbol/signature",
        "description": "Full signature for a symbol in a PyPI or npm package at an exact version: structured params, docstring, deprecation flag with since-version, extracted from the real artifact with signed proof. $0.01 USDC per lookup.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "ecosystem",
            "type": "string",
            "description": "",
            "example": "pypi",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "package",
            "type": "string",
            "description": "",
            "example": "requests",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "symbol",
            "type": "string",
            "description": "",
            "example": "get",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "version",
            "type": "string",
            "description": "",
            "example": "2.32.3",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "API-existence Oracle: signature",
        "tags": [
          "oracle",
          "signatures",
          "hallucination-check",
          "x402",
          "agents"
        ],
        "quality": null
      },
      {
        "url": "https://attester.dev/v2/mcp/report",
        "description": "Signed drift history for one MCP server: pins over time, every detected drift event, and a current verdict (stable, changed, or poisoning-suspect). $0.05 USDC per report.",
        "pricing": {
          "amount": "0.05",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "server_url",
            "type": "string",
            "description": "",
            "example": "https://attester.dev/mcp/",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "MCP Manifest Drift Report",
        "tags": [
          "mcp",
          "security",
          "supply-chain",
          "integrity",
          "report"
        ],
        "quality": null
      },
      {
        "url": "https://attester.dev/verify",
        "description": "Verification Oracle: independent checks on another agent's work (citation support, data/schema validation) returning a wallet-signed attestation. $0.15 USDC per verification.",
        "pricing": {
          "amount": "0.15",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "job",
            "type": "object",
            "description": "",
            "example": null,
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "Verification Oracle",
        "tags": [
          "verification",
          "attestation",
          "agents",
          "trust",
          "audit"
        ],
        "quality": null
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.002",
      "maxAmount": "0.15",
      "avgCostPerTransaction": "0.046",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [
      "qa",
      "evaluation",
      "rubric",
      "grading",
      "agents",
      "risk",
      "counterparty",
      "payments",
      "x402",
      "oracle",
      "packages",
      "hallucination-check",
      "symbols",
      "signatures",
      "mcp",
      "security",
      "supply-chain",
      "integrity",
      "report",
      "verification",
      "attestation",
      "trust",
      "audit"
    ],
    "iconUrl": ""
  }
}