Explore APIs

Payment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options can include Base, Polygon, Arbitrum and XDC; the challenge lists currently available networks for each transport. The receipt identifies the paid network and transaction. Business/professional use only. Terms: https://402rates.com/data-terms/

DNS A record lookup — resolve any hostname or domain to its IPv4 addresses, returned as a clean JSON list. For host resolution, connectivity and uptime checks, IP-reputation enrichment and infrastructure mapping.

Polymarket prediction market odds — live prices for any market by free-text search or slug: outcomes, prices, spread, 24h volume, liquidity, resolution date.

Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime.

Query official FEC historical U.S. presidential popular-vote results for 2016, 2020 and 2024 by state, DC or nation. Preserves named major-party candidates and a labeled all-others bucket. Supports future sourced unofficial snapshots with explicit status and timestamps; unavailable contests are rejected before payment. Free coverage: /elections/catalog.

UK procurement notices. Public procurement notices from the official Find a Tender OCDS feed, flattened to one queryable schema. Blind Mode: no contact or personal data. One call returns one page of matching records as JSON (25 by default, per_page up to 100) with the total count and the last refresh time; the query parameters filter the records.

Payment flow verification for agents integrating x402: confirms your wallet and payment channel work before you spend on a real endpoint. Category: infra.

Aggregate insider-trading market statistics: total Form 4 trades tracked, trades in the last 24h, top 20 most-traded tickers and top 20 most-active insiders by filing count and dollar volume. A one-call overview of where insider activity is concentrated right now. Returns JSON.

Raw RDAP registration record for a domain, returned as structured JSON.

Status of any transaction on 7 EVM chains: pending / success / reverted, confirmations, block time, from/to, value and the all-in fee (including the OP-stack L1 data fee on Base and Optimism). Use it to confirm a payment or deployment landed. You only pay for successful reads: invalid input, not-found and upstream errors cancel settlement.

Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.

Return an advisory ALLOW, DENY, or ESCALATE decision by comparing a bounded action request with authority, constraints, and evidence supplied by the caller. The service does not execute or legally authorize the action, access a wallet, validate identity, or independently observe facts.

Look up the latest Base mainnet block returned by the upstream RPC, including its number, timestamp (Unix and ISO) and gas used. No parameters. An upstream block response does not independently establish chain liveness or data freshness.

Proven X caller-lift leaderboard

Create a new persistent human profile in the vault. Agent-namespaced by wallet address. Accepts initial identity, text samples, observations, and birth data.

Is a Base address a smart contract or an EOA? Returns is_contract and bytecode size. Use when an agent must decide whether a recipient is a contract before sending funds or approving it.

Live prices with 5-minute, 1-hour, 4-hour and 24-hour change and 24-hour volume for the top 50 crypto coins, refreshed every minute.

GET /api/v1/postcode/:postcode - Single Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)

Public URL status, latency, and response header subset for uptime and health agents

Full asset data for one or more slugs (agent-optimized).

Restore all four needs in one care action. Any verified payer may care for any hatched target.

Live reliability feed of x402 endpoints on Base: which services are up, return a valid 402 envelope, and how fast — free-probed across the CDP Bazaar catalog. A real share of listed endpoints are broken/misconfigured; poll ?since=<unix> (or ?health=healthy) to route your agent to endpoints that actually work. Objective measurement, no accusation, machine-readable.

Use when the question is how well ChatGPT, Claude, Perplexity and Gemini can find, read and cite a web page: 0-100 score, letter grade, pass/fail checks (answer-bot access in robots.txt, server-rendered text, title and meta, JSON-LD, canonical, llms.txt, sitemap) and a prioritized fix list with points per fix. Blocking training crawlers does not lower the score. Errors: 400 bad_input, 502 site unr

Official $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.

Gas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.001 USDC/call; failed calls are free.

South African phone number formatting and classification: converts an SA number in any common format to international +27 (E.164) and local formats, and says whether it is mobile, landline (with area for major cities), toll-free, VoIP or premium-rate. Useful for cleaning contact lists, SMS and WhatsApp messaging, and form validation.

Open Commerce Pathways session: a budget from 0.50 to 35 USDC, a flat 0.01 USDC service fee, delegated planning and one report within 1 hour. Returns a session token. Your wallet pays every seller directly. Unused sessions expire; no refunds.

Weather forecast for a location (global, keyless): current conditions, an hourly series (up to 48h) and a daily summary (up to 10 days: min/max temp + condition), from met.no. Pass lat+lon, or a place name. For travel, logistics, events, energy. No API key.

VALUNARIA Evidence Fast

Get detailed information for a specific Kalshi event by ticker symbol