Explore APIs

Upcoming federal contract solicitations from SAM.gov. Filter by keyword, NAICS, or set-aside type. $0.20/query via x402 on Base.

Flood risk for a US address: FEMA zone and SFHA status, annual and 30-year flood odds, elevation and height above nearest drainage (RODA), FEMA NRI inland and coastal flooding ratings.

Resolve a company name or alias to its canonical legal identity — legal name, LEI, SEC CIK and tickers, jurisdiction, and entity status — by cross-checking GLEIF LEI records (CC0) and SEC EDGAR. Answers WHICH company a name refers to.

Coordinate agents sharing one account: reuse matching JSON reads within 30 seconds, or stop duplicate operations using a stable business event ID. Enroll once at /v1/enroll, then authenticate paid calls with your Bearer key. After EXECUTE use /v1/start and /v1/commit around your own tool. Same-request payment recovery is free. Integration and cost measurement: /agent. External execution is not gua

Store the request body under {key} in box {box} (a box_ id, a channel name, or "me" for your wallet's box). Query ttl=seconds (60 to 604800, default 3600). Body up to 65536 bytes. Returns the stored item with its box id, which free GET /box/{box}/{key} reads need.

Global coffee and soft commodities feed: Arabica, Robusta, cocoa, sugar, cotton and orange juice futures with the Arabica-Robusta spread and rule-based market signals.

Native gas on Ethereum, Arbitrum, Base, BNB Chain, Polygon or Optimism, paid in USDC on Base, Arbitrum or Polygon. Offers come from /x402/gas/quote for the chains, a recipient and a USDC amount. The payment goes to an address made for that one order, which delivers at least the stated minimum in native; from another chain, USDC on arrival if the arrival swap fails. An order not executed by its dea

lil payment to test 21.cash

Look up US import duty rates by HTS code or product description. Returns the base General (MFN) and Column 2 rates of duty from the official USITC Harmonized Tariff Schedule (public domain). Reference only: Section 301/232, IEEPA and other additional duties are not included.

Verify a small business's SBA loan history: every SBA 7(a) and 504 loan since 1991 — amounts, approval dates, program, and outcome (paid in full, charged off, defaulted, cancelled). SBA FOIA disclosure data, federal public domain.

Look up FDA drug product information by NDC or name: labeler, dosage form, route, marketing status, approval date. Public-domain FDA NDC Directory data.

Composite medical-device risk card from a UDI device identifier (DI), brand, or labeler company. Returns the GUDID labeler record (brand, company, GMDN term, version/model, catalog number), MR-safety status, GUDID-cited premarket submission signal, a live openFDA recall cross-reference for the labeler, and an explainable risk level. FDA GUDID data (public domain).

Verify an FAA aircraft tail (N-number) registration: status, expiration, make/model, serial, registration fraud & expiry flags. Public-domain FAA Releasable Aircraft Database. Registrant identity is never returned (49 U.S.C. §44114) — only registrant type.

Verify an SEC investment adviser by firm name or CRD number: registration status (SEC-registered / exempt reporting adviser), regulatory AUM and AUM band, Form ADV Item 11 disciplinary-disclosure flag, principal office state, and latest filing date. Public-domain SEC Form ADV data (Investment Adviser Information Reports, October 2026).

Current pump prices at filling stations within a radius of a coordinate in Spain, France, Italy and the United Kingdom, normalised to one fuel taxonomy with amounts in EUR. Suited to finding the nearest or cheapest fuel around a point or along a route.

Extractive summary of an English text: returns the most important sentences. Deterministic, no LLM.

The rate-activity index: admitted-market SERFF rate filings aggregated by state, coverage line, and period (month/quarter/year) -- filing_count, avg_rate_change_pct, share_increasing/share_decreasing, max_increase. Compare Texas vs Mississippi with states=TX,MS. Large admitted-market rate activity is a leading indicator of surplus-lines (E&S) growth. $0.10 per query. Free sample: /v1/rates/sample.

Current USDC balance of an address on Base or Base Sepolia (balanceOf on the official Circle contract).

Generate a time-sortable UUIDv7-based Idempotency-Key with a deterministic payload hash. Send it as an Idempotency-Key header on a retried call to any paid endpoint: the same key and request returns the cached response with no new charge.

Register a golden test case that monitors an API endpoint for behavioral drift (compares live responses against expected output). Returns the created test as JSON.

No description yet.

Quick ZK Auth v1.0.1 — Semaphore ZK wallet ownership on Base plus USDC balance attestation at snapshot block (not ZK-hidden balance in v1). ERC-8004 bundles with x402 payment binding.

Avoid unnecessary browser launches with a lightweight preflight for AI agents. ZeroWorker inspects public pages before browser automation and returns static forms, field constraints, CAPTCHA/SPA signals, DNS/public-network safety checks, and a 3-state routing verdict: http_candidate, browser_likely, or undetermined. Use it to choose direct HTTP or escalate to a browser. No API key required. $0.003

Pay-per-call: meter rules_read, $0.05 (service zeroclass). Unsigned/unpaid → 402 x402/MPP challenge; settle and retry. Returns transfer_partners + the Avios interchange bridge + active bonuses.

Real-time risk-weighted USDC lending APY on Base: Aave/Compound/Morpho read onchain, Moonwell/Euler/Fluid via DefiLlama, source tagged per reading (never estimated). EIP-712 signed by the payment-receiving address (see X-Signal-* headers), which also holds an ERC-8004 identity and attests readings on-chain via EAS. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at

Perfil de contraparte en Base: tipo (EOA, EOA con EIP-7702 o contrato), nonce, saldos de ETH y USDC, y flujo de USDC de los últimos 7 días (recibido, enviado, contrapartes y pagadores distintos). Hechos con número de bloque, sin puntajes. Útil antes de pagarle a un payTo desconocido.

Deterministic line/word/char diff with one-line delta summary. Offline. Amp port.

OSRM driving route (keyless). POST {coordinates|from+to}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose mbta-routes / tfl-line-status (transit adjacency only).

NASA TechPort R&D project search/detail (keyless). POST {projectId?} / {titleKeyword?|query?} / {updatedSince?} / {pageSize?}. Tight field projection. Empty → 400 not charged.

Blockchair chain stats (keyless). POST {chain?} default bitcoin. Chain-level stats — NOT mempool fee estimates (HARD REJECT lane). Soft disclose ≠ mempool/btc-fee · ≠ coinpaprika ticker.