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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "proofcheck": {
      "type": "http",
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

claude mcp add --transport http proofcheck https://proofcheck.something-agent.workers.dev/mcp

[mcp_servers.proofcheck]
url = "https://proofcheck.something-agent.workers.dev/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "proofcheck": {
      "type": "remote",
      "url": "https://proofcheck.something-agent.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "proofcheck": {
      "type": "http",
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=proofcheck&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vcHJvb2ZjaGVjay5zb21ldGhpbmctYWdlbnQud29ya2Vycy5kZXYvbWNwIn0%3D"
}

{
  "servers": {
    "proofcheck": {
      "type": "http",
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "proofcheck": {
      "httpUrl": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

extensions:
  "proofcheck":
    enabled: true
    name: "proofcheck"
    type: streamable_http
    uri: "https://proofcheck.something-agent.workers.dev/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: verify_offer (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); verify_receipt (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); lookup_erc8004_agent (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 509 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

5 tools, about 509 tokens to load them all · tool set 4bbb2ac34127 · checked 2026-11-07 17:28 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 97 / 100

provenance90

liveness99

freshness100

hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-98% +updated-11d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://proofcheck.something-agent.workers.dev/mcp` streamable-http	none	yes	98%	161 ms	2025-11-25	2026-11-07

Tools (5)

`lookup_erc8004_agent`	Read-only ERC-8004 identity lookup (owner, agentWallet, registration file, endpoint-domain verification) on Ethereum, Base, Optimism, Arbitrum, Polygon, BNB, Avalanche, Gnosis, Celo, Linea or Scroll.
`preflight_x402_endpoint`	Unpaid preflight of an x402 URL: fetch its 402, summarise accepts[]/extensions, verify any signed offers and report who can vouch for the signer. Never pays. Free.
`verify_offer`	Verify an x402 signed offer (EIP-712 or JWS): signature, expiry, match to accepts[], and signer-authorization evidence (payTo, did:web, DNS _controllers, ERC-8004). Free.
`verify_payment_required`	Verify every signed offer inside a PaymentRequired object (pass the decoded JSON, or the raw base64 PAYMENT-REQUIRED header). Free.
`verify_receipt`	Verify an x402 signed receipt (EIP-712 or JWS) returned in the settlement response: signature, freshness, payer/resource/transaction match, signer-authorization evidence. Free.

Schemas: list_tools.

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Official server.json

{
  "name": "io.github.something-agent/proofcheck",
  "title": "ProofCheck",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://proofcheck.something-agent.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.0",
  "repository": {
    "url": "https://github.com/something-agent/proofcheck",
    "source": "github"
  },
  "websiteUrl": "https://proofcheck.something-agent.workers.dev",
  "description": "Free x402 offer/receipt checker: verifies signatures and whether the signer fits the host."
}