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Showing the 24,115 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 93,469 listings in all: 23,277 charge, 899 answered without asking, 10,382 did not reach a working endpoint, and 58,911 we have never knocked on. Type something above to search all of them.
Country facts: official name, ISO codes, capital, region, population, area, currencies, languages, calling code, top-level domain, timezones, neighbours and flag, from the free REST Countries API. $0.01 per lookup.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
polygon read-only RPC: allowlisted no-param reads or bounded caller method (eth_blockNumber/eth_chainId/... ). 1MiB cap.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
One call returns a complete intelligence profile for a domain — WHOIS registration, DNS records, SSL certificate, detected tech stack, and blacklist status — aggregated into a single risk-scored report so agents can fully vet a domain without orchestrating five separate lookups.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Share of ESA WorldCover 2021 pixels classified as grassland. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Bilinear surface elevation from Copernicus DEM GLO-30. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Bulk dns ns records: up to 20 domains in one call, processed concurrently, results returned in input order with a per-item error field and a count of failures. Same answer per item as the single /dns/ns endpoint (DNS NS record lookup). Batch enrichment for agents that hold a list. $0.01 per batch.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Car VIN check: decodes any VIN (year, make, model, trim, engine, drive, plant) and adds the model year's safety recalls, complaint counts by component and NHTSA crash-test ratings.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Encode a word with the Metaphone algorithm — more accurate than Soundex for English pronunciation.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Flight compensation eligibility across 7 regimes — EU261, UK261, Canada APPR (incl. s.20 denied boarding), Brazil ANAC 400, Turkey SHY, India DGCA, Israel ASL — plus Montreal Convention baggage claims (effective-dated SDR caps, Art. 31 deadline math): deterministic amounts, legal citations, carrier defenses, evidence list. No LLM — every number is recomputable. Eligible? Get the ready-to-send claim letter at /api/rights/letter ($2.00).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Government scholarship programs for student and financial-aid agents. Covers official scholarships, grants, and student aid by country: India NSP, US Pell, UK Student Finance, Germany BAfoeg, and 50+ programs.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Scholarship essay strategy for student and scholarship agents. Returns committee values, the winning angle, structure, voice, and insider tips (strategy only, not an AI-generated essay).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Decodes a JWT and checks it in two layers. Structure and claims: expiry, not-before and issued-at against the current time with the clock skew you allow, issuer and audience against the values you expect, and the token lifetime. Signature: HMAC with a shared secret, or RSA, RSA-PSS and ECDSA against a PEM key or a JWKS you point at, with the kid matched to the right key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Travel deals and hotel deals finder for any destination worldwide. Returns current hotel deals, attraction discounts, and money-saving travel tips for travel and budget-travel agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Fingerprint a public page so agents can detect changes: final url, etag, lastModified, sha256 contentHash of normalized visible text, raw byteLength, and fetchedAt. POST JSON {"url":"https://example.com"}. Public http(s) only; private hosts blocked. $0.04 USDC on Base (eip155:8453). No API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
US Treasury par yield curve (1mo to 30yr, percent) for one date, or the latest if omitted. Weekend or holiday dates return the nearest prior business day with a note. Data from U.S. Treasury; not financial advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Pump.fun wallet cohorts via x402: ranked rug-pattern, serial-deployer and service/router candidates, with identity/activity when covered, coverage and sample evidence. Cross-check creator or buyer wallets; use mint risk for one mint. Evidence only, no verdict.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
A Treat.rocks rock, $2.00 USDC. Fixed price, no refunds once minted, not an investment. Terms: https://treat.rocks/terms - Verify: https://treat.rocks/verify/<id> - Security: https://treat.rocks/SECURITY.md
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Clinical trial lookup against the full ClinicalTrials.gov registry: exact lookup by NCT number, or search by condition, intervention, or lead sponsor. Returns compact trial summaries (status, phases, conditions, interventions, enrollment, sponsor, dates, results availability). U.S. National Library of Medicine / NIH registry data.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Edge-gap reconciliation first: measures how many of a Solana wallet's real transfer counterparties are missing from any single-call view (edge_gap_ratio, missing_local_edge_count) — the coverage gap a one-shot Helius/RPC lookup leaves behind — then fuses Scry wallet forensics, multi-hop funding lineage, launch-window relationship evidence, identity quarantine, KOL X-handle when available, and coverage/provenance/freshness timestamps into one composite response. Neutral evidence only, no verdicts
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-25.
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/details)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/reviews)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Response headers and security-header report for a URL
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Is this address safe to send funds to on Base? Checks scam blacklists, address poisoning (look-alikes of your recent counterparties via ?from=), token contracts, burn and never-used addresses. Returns a verdict with reasons.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Recent liquidity collapses (rug pulls and dumps) with creator wallets. ?hours=24
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-25.
Signed check of an x402 endpoint before you pay it: who really pays it on Base (settlements and unique payers over 30 days), a fresh unpaid probe (cached ≤5 min) with status, latency and the parsed quote, payability, paying agents' reports, the seller's claim, the scout's last real purchase (settlement transaction and whether it matched the listing), a quality score and risk flags. Free up to 300 calls a day per client at /v1/free/check.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Individual arena strategy signal
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Levenshtein edit distance (insertions, deletions, substitutions) between two strings, plus a normalized similarity in [0,1]. Operates on Unicode code points.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Audit supplied site HTML for on-page, duplication, and internal-link problems
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Fundamentals profile of a cryptocurrency allocation from True Value Rankings: the allocation-weighted scores for the 8 fundamental metrics, each holding's TVR Score and valuation category, and the portfolio TVR Score computed by TVR's scoring engine (the same calculation as the site's what-if simulator). Scores only; no prices. $0.08 USDC per call. Educational model output, not a recommendation.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Uncensored one-turn chat (abliterated LLM): direct, specific answers to any prompt.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Custom-weight rerank of every cryptocurrency covered by True Value Rankings: the full TVR table recomputed with the caller's own weights for the 8 fundamental metrics, using TVR's non-public score transformation. $0.05 USDC per call. Educational model output, not a recommendation.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Where did this address get its money? Walks the funding chain upward and returns the account that ultimately paid for the wallet, plus a cluster id. Two addresses funded from the same account are not independent parties, however unremarkable each looks alone — the cheapest strong signal that an identity was manufactured. Works on any address, not only registered agents. Free alternative: GET /v1/provenance. Trial: 3 free calls/wallet/24h — https://trust-agent.io/v1/trial.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
ERC-8004 agent directory filtered to what is live: registrations classified by a continuous census of the Base registry, filterable by quality (for example a valid file with a declared service) and by x402 support. Each row has the agent id, owner, payout wallet, what it declares (name, endpoint, skills) and a funding cluster shared with agents paid for from the same account. 100 per page. Free: GET /v1/registry. Trial: /v1/trial.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Cross-chain ERC-8004 trust score for one (chain, agent) pair — signed JSON with transparent component breakdown (value_avg / client_breadth / volume / recency), per-chain context, and methodology link. USDC pay-per-call on Base mainnet.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Markdown frontmatter to JSON. POST a Markdown file that begins with a --- fence; the response is {"data": the parsed YAML frontmatter, "content": the body returned byte for byte}. A file with no opening fence is refused rather than reported as having no metadata, because a mistyped fence should not look like an empty one.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Agent-market demand snapshot: per-category demand scores (defi, nft, infra, social, analytics) with sample sizes, data-source labels, and confidence grades. Input: optional ?category= query filter. Output: JSON { generated_at, categories[], meta }.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
SociaVault API proxy — linkedin-profile. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per call. $0.014 USDC per request.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Conspiracy theory deep-dive for researcher and journalist agents. Synthesizes public records, FOIA releases, declassified docs, and court filings on any theory into what the evidence actually shows.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Read any public web page as clean markdown — rendered, boilerplate stripped, ready for a context window. Use it when your agent needs the content of a URL and has a wallet instead of a scraping stack. Charged ONLY if the fetch succeeds; a failed fetch costs nothing. stealth=true ($0.05) gets past aggressive bot protection. Pair with /v1/web/search to find pages first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Court case intelligence for researcher and journalist agents. Returns charges, verdict, sentence, key rulings, and legal reasoning from public records across US, UK, Canada, Australia, ICC, and ECHR.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Pure astronomy and geometry on level ground: sun position by the NOAA method, shadow length as object height divided by the tangent of the sun elevation. Refraction is only applied to sunrise and sunset. Terrain slope, surrounding buildings, vegetation and diffuse light are not modelled, so a point outside the shadow can still be shaded in reality. Times are UTC.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
SqueezeOS — Api Ftd Cycle Gme
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Get the latest tweets (timeline) from a specific Twitter/X user by their username. Returns up to 20 tweets per page sorted by most recent first, with pagination support. Query params: username (string, required) - Twitter screen name; next_token (string, optional) - pagination cursor, e.g. GET /tweets/user?username=elonmusk. Returns X v2 API-compatible JSON.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Look up a Twitter/X user profile by their screen name. Returns full profile data including id, name, username, bio, follower count, following count, tweet count, verification status, and profile image URL. Query param: username (string, required) - Twitter screen name without @, e.g. GET /users/by/username?username=elonmusk. Returns X v2 API-compatible JSON.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Draft tweets with AI: generate variants from a topic and goal, refine an existing draft, or score a draft for likely engagement — with tone, call-to-action, and style-matching options. Flat sub-cent price per step.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Read live X/Twitter data: look up a single tweet or user profile, batch-read up to 100 tweets or users at once, check whether one account follows another, fetch trending topics by region, extract a long-form article, or download tweet media. Pay per call in USDC — no API key, no signup; failed calls are never charged.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Get X search suggestions for a partial query.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Get media posts from an X community.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Payment-rail comparison across stablecoin-native L1s (Plasma, Circle Arc, Stripe/Paradigm Tempo, Tether Stable) and incumbent chains (Tron, Solana, Base) — fees, finality, and ecosystem maturity, grounded in live search and cited.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
Tickers covered by filings.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-25.
The description and the price are the SELLER’S, copied from their listing and not checked by us. The badge is OURS and is one unpaid handshake: “answered unpaid” means it answered us once without asking for payment, which is not a standing offer, and an unpriced listing is unpriced rather than free.
Knocking goes to the knock page, which reads the terms live before anything is signed. A listing can be out of date in both directions, which is the reason to knock rather than to read a row.