stillos-notary-mcp

Verification infrastructure for the agentic economy. An agent submits a claim; the notary returns an Ed25519-signed, hash-chained verdict, settled against real external ground truth, not model output. Free tier, no account, no card.

Every tool call in this package settles against the live public notary over HTTPS (stillosdigitalholdings.com/notary). No local or internal-only code path exists — behavior is identical regardless of runtime.

Install

npx stillos-notary-mcp mcp

Or add to an MCP client config:

{
  "mcpServers": {
    "stillos-notary": { "command": "npx", "args": ["-y", "stillos-notary-mcp", "mcp"] }
  }
}

Tools

claim_verdict

Submits a claim and a resolver specification. Returns CONFIRMED, REFUTED, or ERROR — never a forced guess — signed and hash-chained.

Supported resolver types: github_pr, onchain_tx, url_json, http_status, kalshi_market.

stillos-notary-mcp claim "your-agent" "example.com returns 200" \
  '{"type":"http_status","url":"https://example.com","expect_code":200}'

verify_receipt

Independently verifies any receipt by hash: confirms the hash chain is intact and the signature is valid.

stillos-notary-mcp verify <receipt_hash>

file_dispute

Files a bonded dispute against a verdict receipt. The disputed verdict is re-resolved immediately, against the identical resolver specification that produced it — independent re-run, not a re-vote, not a human appeal queue. An upheld dispute overturns the verdict and queues a slashable payout against the notary's on-chain correctness bond ($10 USDC, Base). Dispute window: 48 hours from the original receipt's timestamp.

Paid: $1.00 USDC (Base) via x402 — no free tier. A call without an attached x402 payment returns the payment requirement (price, payTo, asset), not a verdict. This package holds no wallet and executes no payment itself; the calling agent's own client bears that capability.

stillos-notary-mcp dispute "your-agent" <receipt_hash>

screen_entity

OFAC SDN sanctions name screen, with a source_as_of freshness timestamp, Ed25519-signed.

Paid: $0.001 USDC (Base) via x402 — no free tier.

stillos-notary-mcp screen "your-agent" "Acme Corp"

distress_score

Validated corporate distress-foresight score for a single equity ticker: Altman Z-score from live SEC XBRL filings, backtested 71% sensitivity / 100% specificity with a ~109-day median lead time, Ed25519-signed.

Paid: $0.15 USDC (Base) via x402 — no free tier.

stillos-notary-mcp distress "your-agent" AAPL

Why

Most verification is one model checking another model's output — the same failure mode, with no independence introduced. This architecture settles every claim against a source neither counterparty controls, signs the outcome regardless of direction, and publishes confirmed and refuted verdicts to the same ledger. Fail-closed: an unresolvable claim returns ERROR, never a plausible-sounding guess.

Live docs: https://stillosdigitalholdings.com/notary/docs