198 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Verify an EIP-191 personal_sign or EIP-712 typed-data signature and recover the signer address from public inputs (message + signature). Verification/recovery only — never signs.
Fact check, verify a claim. Check a claim against the live web in one call: a Brave search, the top pages read, and a verdict from Llama 4 Scout using those sources only (supported, contradicted, mixed or unverified) wit...
Fact-check one claim against live web sources (or URLs you supply). Returns a verdict (supported, refuted, mixed, insufficient), a confidence score and supporting or contradicting quotes that are checked verbatim against...
Payment receipt and settlement proof for x402 and agent payments, by Liquid Logic X. Input: a Base USDC tx hash (optional memo). Output: JSON proof recorded onchain on Arc mainnet (proofId, from/to/amount, Arc tx, refId)...
Attest a decision: sign (input_hash, output_hash, decision) yourself, or omit the signature and the treasury signs — then dual-chain anchor. Free re-verify at /v1/attest/verify. $0.01 USDC.
Find missing or stale declared evidence before a governance review. Compare up to 40 control requirements with revision- and scope-bound evidence descriptors. Does not inspect evidence contents, evaluate control effectiv...
Validate and normalize a JSON audit-event export before reconciliation. Check up to 100 supplied metadata events for duplicate IDs, malformed timestamps and invalid digests. Returns normalized events and an integrity rec...
Check citation metadata before an evidence review. Compare up to 20 declared source identities, revisions and locators; return exact mismatches and an integrity receipt. No source retrieval, passage-existence check or cl...
Bank account / IBAN verification in one call: ISO 13616 checksum + per-country structure validation, BIC / bank name / branch resolution, country details, SEPA-zone flag, and a deterministic 0-100 fraud/KYC risk score wi...
Check declared MCP tool contracts before an upgrade. Compare required names and exact input/output schema digests with a supplied server snapshot, protocol version and transport. No server contact, semantic schema-subtyp...
Verify an IOTA notarization: give the object id or transaction digest of any notarization on the IOTA mainnet (ours or anyone's, official IOTA Notarization package) and optionally the text, SHA-256 or URL to check. Retur...
Verify an OpenTimestamps proof (.ots as base64, from btc-timestamp or any ots client): upgrades pending proofs from the calendars, checks each Bitcoin attestation against the real block's merkle root and returns status (...
Compare up to 32 requested uses with an explicit machine-readable license policy for reading, internal use, redistribution, resale or training. Unknown policies remain undetermined. Does not interpret legal prose, verify...
Offline validator for a Romanian CUI (company tax ID). Strips an optional 'RO' prefix, applies weights 7-5-3-2-1-7-3-2 to the digits preceding the check digit (right-to-left), sums the weighted products, multiplies by 10...
Resolve declared committee-level filing IDs, duplicates and amendment chains only with explicit commercial authorization and no individual contributor information. New modular adapter: retained result recovery for 24 hou...
Verify a bounded civic-ledger-1 public organizational decision suffix against declared checkpoints, including expected-head truncation detection. No Merkle proof or anchor. New modular adapter: retained result recovery f...
Check presence of baseline, primary measure, acceptance threshold and bounded stopping rule; no efficacy or statistical validation. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for...
Debug uncertain x402 retries before paying again. Inspect up to 80 supplied attempt records for changed intent, nonce or request-key reuse, repeated settlements and ambiguous outcomes. Returns findings only; no live prov...
Reconcile an agent session payment export. Match up to 64 supplied settlement rows and 64 delivery receipts, flag missing or contradictory records and reused transaction references, and total unique settlements exactly....
Prepare a reproducible research handoff from supplied public or synthetic artifact contents, dependencies, algorithm version, seed and Supplied-record analysis, not independent certification. Full contract at the free de...
Compare up to 12 caller-supplied public committee-level totals and filing references at a declared assessment Supplied-record analysis, not independent certification. Full contract at the free describe URL.
Reconcile up to 80 committee-aggregate or non-personal organizational public/synthetic campaign ledger entries against declared opening and closing Supplied-record analysis, not independent certification. Full contract a...
Check a revision handoff before reusing evidence. Compare one initial or superseding transition with its declared predecessor; return lineage inconsistencies and an integrity receipt. Does not establish authenticity, sem...
Does service@<domain> look deliverable? Builds the service@ address for the domain you give and runs the verifier: syntax, MX presence, mail provider, disposable/free-provider flags, SPF/DMARC presence and a deliverable/...