All projects on Base matching “idempotency”

Anchor an AI agent decision or audit record to Base mainnet. Submit {schema, payload_hash (SHA-256 hex, 64 chars), metadata}; service queues into a Merkle batch and returns a receipt with pending_anchor status immediately. Full Merkle proof and on-chain anchor_tx available via free GET /v1/notarize/:receipt_id after batch anchors (within batch_threshold receipts or 120s). Include Idempotency-Key h

Distributed lock / idempotency primitive for multi-agent swarms. claim(key) returns a token if free (with TTL); release(token) frees it; check(key) reports whether held. Stops multiple agents from double-processing the same work item.

Notarize an AI agent decision, audit record, or any payload to Base mainnet. Submit SHA-256 hash + metadata; get a tamper-proof verifiable receipt immediately. Merkle proof and on-chain anchor_tx available free after batch (~120s). Use Idempotency-Key to prevent double-charges on retry.

Check Base ERC-20 decimals and total supply at a recorded block, and up to three claims against cited evidence. Returns supported, contradicted, or unknown. Official project coverage currently includes Base USDC only. No safety verdict, liquidity, or holder analysis. One brief costs 0.25 USDC; retain your private Idempotency-Key for recovery.

Datoka Agent: one signed execution declaration receipt. Retry with the same event, idempotency key and payment.

Paid webhook/API execution for autonomous agents. Executes one public HTTPS action after x402 payment, applies retries and idempotency, then returns a signed receipt with request hash, response hash, target, status, and attempt count.

Random UUID generator — returns time-ordered UUIDv7 (RFC 9562, sortable, database-key friendly) or fully random UUIDv4, 1 to 100 per call, as lowercase canonical strings. Use for unique IDs, primary keys, request and correlation IDs, idempotency keys.

Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change investigations. 0.002 USDC per receipt; offline verification is free. Keep original bytes locally. Does not prove provider origin or content truth. Retry with the same event, idempotency key and original payment authorization.

Checks a list of payment records for common reconciliation bugs: payments marked settled without an on-chain reference, payer or payee stored as a display name instead of an address, idempotency keys that let the same payment through twice, and ledger counts that differ from the chain scan. Returns the findings per row.

Bitcoin read-only RPC and supported simulations. Submit method and params as JSON. Method schemas, limits and prices: https://api.block402.xyz/docs/api.md. Obtain a bound quote with a private Idempotency-Key before signing.

Sign up for Aient as an autonomous agent by paying once: your wallet address becomes the principal, an organisation is provisioned, and the response includes the publishable telemetry-ingest endpoint plus a first environment key. Idempotent per wallet.

Buy one virtual number for SMS verification. First GET /agent/v1/quote, then POST here with X-Quote-Id and Idempotency-Key (service_id/country_id in the query string). The 402 advertises the locked price. If no number is available the API answers 409 no_numbers and nothing is charged.

JSON canonicalization — canonicalize structured data with RFC 8785 JCS; return canonical JSON text, UTF-8 byte length, and SHA-256 hash for integrity checks, signature preparation, and deduplication. Includes an EIP-712 signed attestation. Use when an agent needs an idempotency key, cache key, dedup hash, or verifiable commitment. $0.002 per call. Free verification at POST /v1/verify.

x402 402-lint: fetches a paid URL unpaid, decodes its 402 terms and checks v1/v2 shape, network, amount units, payTo, timeout, CORS, and extra.name/version against the token's on-chain EIP-712 domain.