All projects on Base matching “signed”

Parses a bank statement (CSV from any bank, camt.052/053/054, MT940, OFX/QFX, QIF) into normalized JSON: accounts, balances and signed transactions with ISO dates, counterparty, reference and OCR number. Deterministic, no AI, nothing stored. JSON body up to 1000 KB. Failed calls (4xx/5xx) are not settled.

Search U.S. federal contract actions in FPDS-NG by description keyword, contracting agency code, NAICS, and signing-date window. Returns PIIDs, obligated amounts, vendors, NAICS, PSC, and direct FPDS UI links.

Notarize freelance deliverable. Returns signed PDR.

Signed time attestation: timestamp bound to a payload hash, anchored in the cumulative Merkle log

Independent fact + signed receipt. $0.01 USDC.

OSCAL evidence bundle for one obligation: EU AI Act Article 50/53, DORA or EU-CRA. Returns selected card objects with signature fields, any retained inclusion proofs, an OSCAL wrapper and assembly manifest. Does not verify input-card signatures. Reports manifest signing status and any unsigned reason. States: ASSEMBLED or ASSEMBLED-EMPTY; zero selected cards stays zero. Supported-card verification

Ownership verification with a signed receipt. The receipt is the product: the same answer is available for free at /api/verify-ownership.

Agent Referee — fair random pick between two AI agents with agreed odds (e.g. 70/30). Both agents add secret seeds so neither can steer it. Each agent pays this to join. Neutral third party for agents that can't agree; commit-reveal so no side (and not the server) can rig it; Ed25519-signed receipt. Step 1: POST /matches (free) to get match_id. Step 2: this call claims your seat and returns seat_t

Offline pre-sign check (no RPC, fast): decodes a transaction, EIP-712 typed data (Permit, Permit2, EIP-3009), an EIP-7702 authorization or an x402 402 + payment payload and returns SAFE/CAUTION/DANGER, every risk flag with its reason, decoded args, counterparties, x402 payment-vs-402 match and OFAC SDN screening. Use /v1/check for on-chain facts and simulation.

DNS and email-authentication audit for one domain: A/AAAA presence, NS count and whether the nameservers share a /24, MX (including a null MX), SPF (missing, multiple, +all, ~all, ?all), DMARC (missing, p=none, no rua, partial pct), a DKIM selector probe, CAA, and whether the zone is DNSSEC-signed. Read entirely over DNS-over-HTTPS, so nothing is sent to the target host. Every finding carries a st

Builds a gas-optimized multi-recipient payout plan: either a list of native transfers or a single Multicall3 aggregate3 batch of ERC20 transfer() calls. Returns calldata only - this service never signs or broadcasts.

Mezo MUSD mainnet (eip155:31612) immutable fixed-token pinned ERC20 symbol/decimals/totalSupply/code hash, and optional owner/spender public balance/allowance. Complete strict public Mezo read before 0.01 native Circle Base USDC signed x402 payment. Not a backing/peg/yield/bridge-audit claim. No keys, transactions, balances moved or payer self-purchase.

Paid evidence check for agents: signed record, machine-readable verification result, explicit unknowns, and a settlement receipt. A valid signature is not real-world truth.

Download a video through the maintained, authenticated extraction path described in the service description; no signup or API key. This entry's `supported_sites` lists what is proven on this deployment and `limits.sites` explains how to read it — a site's absence means unproven, not refused. Returns a zip by signed URL. This is the tool that is hard to replicate yourself.

Settlement-backed machine evidence for autonomous agents. Returns a signed-payment transaction reference and machine-readable proof after exact USDC settlement.

Agent Referee — settle a deadlock with another AI agent by fair rock-paper-scissors. Ties replay free. Each of the 2 agents pays this to join. Neutral third party for agents that can't agree; commit-reveal so no side (and not the server) can rig it; Ed25519-signed receipt. Step 1: POST /matches (free) to get match_id. Step 2: this call claims your seat and returns seat_token. Full instructions: GE

Evidence snapshot: up to 10 hostnames, results in the answer, the signed and anchored report within the hour

Mandato AR Intent Mandate scope (SKU#19) — verify allowlist+budget+expiry+signature. Does not create or sign.

Use when you need to know whether a website or mail server has a valid HTTPS certificate or when it expires: opens a live TLS connection (SNI) to the host and returns whether the chain is publicly trusted (with the exact error, e.g. CERT_HAS_EXPIRED or self-signed), whether the certificate matches the hostname, validity dates and days remaining, subject, issuer, SAN list, key type, TLS protocol, c

Load when an agent needs pre-action verification of factual claims — multi-source confidence scoring with JWS-signed receipt, offline-verifiable per draft-krausz-verification-state. $0.02 USDC per query on Base.

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.

DNS and email-authentication audit for one domain: A/AAAA presence, NS count and whether the nameservers share a /24, MX (including a null MX), SPF (missing, multiple, +all, ~all, ?all), DMARC (missing, p=none, no rua, partial pct), a DKIM selector probe, CAA, and whether the zone is DNSSEC-signed. Read entirely over DNS-over-HTTPS, so nothing is sent to the target host. Every finding carries a st

Offline EIP-712 typed data (chain-agnostic, no RPC): domain + types + primaryType + message JSON in, the normalized typed data plus domainSeparator, hashStruct and the final digest (the 32-byte value the wallet signs) out — with an optional signature (0x+65 bytes) it recovers the signer address (ecrecover), confirmed against an optional expectedAddress (recover.ok). Structs nest (arrays of structs

x402 preflight: before your agent signs a payment, fetch a paywalled URL's 402 and lint it. Parses v1 bodies and v2 PAYMENT-REQUIRED headers, then checks each accepts[] option: known network, canonical USDC, EIP-712 domain (extra.name/version) that a signature will verify against, EIP-55 payTo, zero/contract payTo, amount sanity, timeout, testnet, resource-host mismatch. Returns ok/warn/block per

A registry of token records with a build log. A record is written only by the token's provable controller (on Solana: the pump.fun curve creator or the mint's update authority) and every version carries that ed25519 signature, so a reader verifies against the chain, not a directory. One $0.02 x402 write in USDC on Base, Polygon, Solana or Arc; reads, pages, log and OpenAPI are free.