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autobus MCP Server Attestation
x402
autobus MCP Server Attestation is a paid API for AI agents from witness.holoweave.org, paid per call via x402, $0.03/call, status down (last checked 2026-09-15).
Attests the live tool surface of an MCP server against its registry definition, returning a signed Ed25519 verdict on whether the server matches its published version
Price / call$0.03
Success—
StatusDown
How this service works
Web bot auth debugging for AI agents, priced per check at $0.01. RFC 7638 keyid thumbprint verification, RFC 9421 Ed25519 signature verification, and per-verifier acceptance rules. Signed attestations, published fixtures, sources with dates.
Output
A signed attestation object containing: an Ed25519 signature (algorithm, base64 value, key_id), and an attestation block with a verdict (pass/fail), the endpoint name, and evidence covering live server reachability and tool count, a surface digest, a registry status and version, a diff report showing added/changed/removed/unchanged tools, and a card presence indicator.
Example use cases
Pre-task MCP server integrity check
“Before I let my agent use the autobus MCP server, attest it — check that io.github.ninefiveonefive/autobus is still running version 0.2.0 with the expected tools and give me a signed pass/fail verdict.”
Drift detection after deployment
“I pinned the autobus MCP server last week and got a surface digest of ba77… — can you attest io.github.ninefiveonefive/autobus now and tell me if any tools were added, changed, or removed since then?”
Supply chain audit for agent pipeline
“I need a cryptographically signed attestation that the MCP server io.github.ninefiveonefive/autobus is active, reachable, and matches its published registry entry — I want the Ed25519 signature I can log for compliance.”
Technical details
Endpoint
POSThttps://witness.holoweave.org/v1/mcp-server-attestWhen to prefer
Choose this endpoint when you need a cryptographically signed, third-party attestation that an MCP server's live tool surface matches its published registry definition — particularly before trusting an MCP server in an automated pipeline, after a deployment, or for compliance logging. Prefer it over simple reachability pings when you need tamper-evident proof (Ed25519 signature) and a structured diff of tool changes.
Side effects
- Registry server name not found — returns error if namespace/name does not exist in registry
- Server unreachable — live reachability check fails, verdict reflects this in evidence
- Version mismatch — requested version differs from active registry version
- Tool surface drift detected — diff shows added/changed/removed tools, verdict may fail
- Invalid baseline digest format — malformed surface_digest in baseline block causes validation error
- Payment not received — x402 payment of $0.03 USDC required; unpaid requests are rejected
Output
Schema · Response
{
"example": {
"signature": {
"alg": "ed25519",
"value": "base64...",
"key_id": "aw-attest-2026-08"
},
"attestation": {
"verdict": "pass",
"endpoint": "mcp-server-attest",
"evidence": {
"card": {
"present": false
},
"diff": {
"added": [],
"changed": [],
"removed": [],
"unchanged": true
},
"live": {
"reachable": true,
"tool_count": 9,
"surface_digest": "ba77…"
},
"registry": {
"name": "io.github.ninefiveonefive/autobus",
"status": "active",
"version": "0.2.0"
}
}
}
}
}Tags
x402
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