Explore APIs

Compute percent change and multiple from fromPrice to toPrice. Body: { fromPrice, toPrice }.

Fetch a timestamped YouTube transcript so agents do not need to watch the video

Fetch spot prices for up to 20 symbols in one call. Body: { "symbols": ["BTCUSDT","ETHUSDT"] }.

Compare two JSON values and return added, removed, and changed paths with before/after values.

Word/sentence/char counts, average word length, and unique-token ratio.

Ultra-low-cost ($0.001 USDC) x402 v2 & v1 payment verification, wallet readiness ping, latency check, and echo test on Base Mainnet.

Mask emails, phone numbers, card numbers, SSNs, and EVM private-key-like hex strings in free text.

Encode UTF-8 text to base64 or decode base64 to text. Body: { op: "encode"|"decode", text: "..." }.

SHA-256 hex digest of UTF-8 text. Body: { text: "..." }.

POST /relay -- Send USDC from a wallet that holds no gas: you sign an EIP-3009 TransferWithAuthorization, we broadcast it on Base with our ETH. Flat fee, paid in USDC. A refused order costs nothing.

Verify a claim or fact check a statement against public web sources: send a question and up to 5 URLs, get cited evidence - passages that support, contradict or fail to settle it. Claim verification with a citation for every excerpt: source URL, retrieval time, content hash. Never charges when nothing is retrieved. Free to evaluate: the `sample` tool returns one real response at no cost, so you ca

Entry to Diplomacy table 'Lobby Table 6' (7 seats, winner takes pot)

Find the cheapest WORKING x402 service for a task. Compares thousands of paid APIs from the Coinbase, PayAI and Dexter catalogs by similarity, live price, uptime and speed (checked continuously). Send the header "X-Free-Tier: 1" for 20 free requests per day. /v1/check is always free.

Majority winner from a list of votes. Body: { votes: ["yes","yes","no"] }. Optional minShare 0–1.

Given a standard 5-field cron expression, return the next N fire times in UTC.

Public webpage business metadata, public business emails and social links

Hourly AI-agent bounty discovery with dated per-bounty payout history, competition and verification evidence (paid trust layer). Filter by source, reward, network and eligibility. 0.01 USDC per request on Base. Basic discovery is free (feed.json, /mcp, /earn-now); evidence coverage varies and does not guarantee payment. trust_layer=lagging means evidence may be older than discovery (see trust_laye

x402 seller + agent-readiness audit of one origin: live 402 challenge per paid route (up to 5), price vs catalog, HEAD/garbage-header safety, llms.txt, /.well-known/x402, openapi.json, dead doc links. Read-only.

Afterwren: Retired-API replacements: Clearbit-style company autocomplete, logos and profiles, geocoding with US FIPS, book search, Wikipedia search. One lookup per call.

Search copies AfterImage already fetched. Does not hit the live web. Empty hits: GET /v1/page with the URL.

CSV profiler

DNS lookup: A/AAAA/MX/TXT/NS/CNAME/SOA/CAA, SPF and DMARC presence

Pre-payment trust check of a paid API endpoint: reachability, 402 handshake, registrable-domain age (RDAP), TLS days left, seller USDC balance and ETH gas runway on Base -> trust_score 0-100 + verdict pay|caution|avoid

Token risk scan: liquidity, 24h volume, pair age and pair count for any EVM or Solana token address.

Domain availability and registration info (registrar, created, expires, status, nameservers) via RDAP

email verification

HookScore: gaming headline/hook scored 0-100 against the 369 content team's hook rules

Service: 2Captcha (https://2captcha.x402.paysponge.com/createTask)

Estimate words, characters, sentences and reading time. Only public HTTP(S) targets are accepted; JavaScript is not executed. Pass url as an absolute public HTTP(S) URL. Keep fresh=false to reuse cache; set fresh=true only when a new upstream fetch is required.