14 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.
Prove you had this sha256 at this time: signed receipt with its position in neo's public log, anchored daily on Bitcoin (OpenTimestamps) and Software Heritage.
Signed evidence that a public page said this at this time: sha256 of the fetched text, the text itself, final URL and status, logged in a public append-only log anchored daily on Bitcoin and Software Heritage.
Dokimo Verify API (GET) - scheme demo: recomputes a sample dokimo-merkle-v1 proof to its root and verifies nothing of yours. For real caller verification, POST /paid/verify with {leaf, proof_path, root, rule_version_comm...
HMAC-signed readiness attestation pack for an RWA score/dossier — auditable proof artifact for desks. Pay $0.15 for a signed trail legal can point to. Not a notary act or trade authorization. Task: Call when legal/audit...
Inspect a current fail-closed closed-candle scan across 21 supported crypto assets and timeframes, including Syntalium Index, market state, reason codes, Market DNA, freshness, and optional public signal or SNAP proof co...
Signed proof of what a web page said: give a URL, get its text, screenshot and TLS details with a timestamped cryptographic signature anyone can verify.
Verify a genesis402 signed receipt — signature and hash-chain position — Genesis402 / UnyKorn Operator Network
HMAC-SHA256 integrity commitment over node health assessment and eBPF XDP/LSM status. Provides tamper evidence (BLAKE3+Ed25519 per paper Section 6.3). Not a zero-knowledge proof.
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 (...
Check a UUID: send a string and get whether it is a valid UUID plus its version and variant. $0.001 USDC per call on Base.
Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.
Merkle root over a list of leaves — Genesis402 / UnyKorn Operator Network
TESTNET ONLY: prove the KlearFlow recover_revenue x402 capability through the PayAI facilitator using test USDC.