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Showing the 22,961 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 83,982 listings in all: 22,155 charge, 865 answered without asking, 9,910 did not reach a working endpoint, and 51,052 we have never knocked on. Type something above to search all of them.
Kaiseki Autumn — Seasonal kaiseki meal for autumn context, timing, and environmental awareness.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Hanami Picnic — Cherry blossom viewing for time-limited appreciation and transient value.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Fundable — Resolve a company NAME to Fundable's own company `id`, with fuzzy matching and a `relevance_score`. Pass any ONE of `name`, `domain`, `linkedin`, `crunchbase`. The entry point to the graph when all you have is a name: the `id` it returns is what fundable/company and fundable/company-deals take. If you already have a domain, call those directly instead and save the hop.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
MapQuest — live traffic incidents and construction inside a box, 1¢. Params: `boundingBox` ("lat1,lng1,lat2,lng2", any two corners), optionally `filters` (array of construction | incidents | event | congestion). Each incident carries type, severity, a short description, start/end times and coordinates.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Signalbase — COMPANY search independent of any signal: profiles with industry, headcount, location, founded year, categories. Filters: `search` (free text), `domain`/`linkedin_url` (exact lookup), `industry`/`categories` (comma-separated), `countries`, `employee_count_min`/`max`, `founded_year_min`/`max`. `limit` ≤100 — flat price per call. Use to resolve/browse companies before pulling their signals.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
DNS A lookup - Call when you need the IPv4 addresses a domain resolves to - verifying a deployment, checking a migration, or confirming an origin. Send the domain. Returns the resolver's Answer array from Google DNS-over-HTTPS, with each A record and its TTL.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
GitHub user lookup - Call when you need to verify or profile a GitHub account - checking a contributor, enriching a lead, or confirming an identity. Send the username. Returns name, bio, company, follower count and public repository count as JSON from GitHub's public API.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Return a low-cost deterministic paid receipt proving the AUN x402 purchase path delivered its contracted response; intended for autonomous service/liveness verification, not downstream business-value proof. $0.001 USDC per call on Base.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Similar Words Lookup - Get up to 20 words related in meaning to the input phrase using Datamuse's related-word API; fast lookup with no API key required.. Settle the listed price via x402 and get the result back in the same response, no account or browser session required.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Enforce exact declared owner, subject, revision and allowed scope labels; a matching label grants no permission or access for battery/cell-config/lot/method-pinned Supplied-record analysis, not independent certification. Full contract at the free describe URL.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Enforce exact declared owner, subject, revision and allowed scope labels; a matching label grants no permission or access for optical geometry/calibration/lot/method-pinned Supplied-record analysis, not independent certification. Full contract at the free describe URL.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Compare caller-declared token counts with per-source and total pack token ceilings. No tokenizer, packing execution or claim that all required evidence fits. Offline typed nonpersonal metadata only. Result retention: 24 hours; minimal receipt metadata: 90 days.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
How many units of a token exist? Returns the total supply of an ERC-20 token on Base, scaled by its decimals, with its symbol ($0.002 per call).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
What exactly is in this Base transaction? Returns sender, recipient, ETH value, gas limit, block, nonce and whether it created a contract; unknown hashes return 404 and are not charged ($0.005 per call).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Use when an agent needs to know how it is seen from outside: its public IP plus the country, region, city, ASN, AS organization, Cloudflare colo and TLS/HTTP version recorded by Cloudflare's edge for this connection. No external lookup. $0.001 per call (USDC or USDT). Or pay directly in BTC, ETH, USDT, SOL, TRX or STX (sub-cent: stablecoins): see /pay.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Look up a package on npm or PyPI: latest version, description, license, dependency count, keywords and release date. Use it before adding a dependency, to judge whether a project is maintained and how much it pulls in.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Convert an amount between currencies using European Central Bank reference rates. Use it for currency conversion, to price something in another currency, or to check the current rate.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Convert square centimetres to square millimetres for area. SI/international definitions; IEEE-754 numeric precision. This is a specialised route of the area converter, not a separate data provider.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Use when an agent needs the top x402 services tagged 'perps'. Returns Retired route /in-perps: now serves the live /in-x402 ranking, the top 25 x402 services tagged 'x402' by 30-day unique paying wallets.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Highest-demand x402 services tagged 'twitter': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 108 providers and 306 paying wallets measured in this tag.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Prompt Caching Review — Reviews ONE Claude API request (tools, system, messages, the cache marks, the model, the sizes and how often it is sent) for the five reasons its prompt cache does not pay off, and lists only those, one line each with a fixed code, the place, why the cache misses and the fix - or exactly No findings. It catches text that changes on every call (a clock, a request id, a user name) at or before the cache mark, a large stable prefix with no mark, a marked prefix shorter than…
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Parallel Agent Worktree Review — Reviews a plan or shell script that lets several coding agents work in parallel, each in its own git worktree, and lists only the five mistakes that make the agents collide, one line each with a fixed code, the place, why it breaks and the fix - or exactly No findings. It catches one branch checked out in two worktrees or forced onto a second one, two agents started on the same fixed port, an untracked secret file missing in a new worktree or written by two agen…
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Subtitle Translator for SRT and VTT — Translates a subtitle file (SRT or WebVTT) into another language and returns the whole file with only the spoken words changed. Cue numbers, timing lines, cue settings, position codes, speaker names, style and note blocks come back byte for byte; every cue stays one cue, in the same order, with at most two lines of at most 42 characters, shortened in wording when the translation is longer. Tags and markers such as italics, colours, music notes, dialogue das…
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
All active crypto markets with live probabilities in one call — One-call board of the most active crypto prediction markets: top markets by volume with blended live probabilities, resolution dates, and per-market slugs for drill-down. The bulk read for agents tracking the state of crypto at a glance.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
US State Department travel advisory for a destination country. Returns the advisory level one to four, its label, the summary and the last-updated date, normalized to one cited JSON. Authoritative and live. Informational, not travel advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Working code snippets for a library, matched to a topic. Give an ecosystem, package name and a topic or symbol and get the fenced code blocks from the README or docs whose language, code or nearest heading matches, each with a source citation and an honest truncated flag. Ideal for grounding a coding agent in real usage examples.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Upcoming crypto event resolutions — Upcoming crypto market resolutions in date order with current blended probabilities — the forward calendar of crypto events an agent can position around. Same shape as /v1/calendar, pre-filtered to crypto markets.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Will it rain in Philadelphia during your event window — Event-window weather odds for Philadelphia: pass a start and end time (or omit them for the next six hours) and get rain probability and expected conditions across the window — built for scheduling decisions. Same shape as /v1/forecast/window with the Philadelphia coordinates built in.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Phishing/trust verdict for a website domain before an agent transacts with an unfamiliar merchant. Fuses registration age (RDAP), DNS/mail posture (SPF, DMARC, DNSSEC), TLS validity, Certificate Transparency history and a typosquat/homoglyph analysis into a composite trust score 0-100, a category (trusted / caution / untrusted / unknown), per-dimension flags and reasons. Trust indicators, not a guarantee.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contradicts/neutral). Answer in a few seconds. Try GET /fact-check/sample. Independently monitored: lumierepaycheck.org/e?url=https://x402.agentindex.world/fact-check
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Probe any public URL and report if it is an x402 paywall - price, network, payTo, scheme. Shop paywalls before you spend. Try GET /probe/sample.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Base token safety check: Claude Haiku 5.5 (Anthropic) writes a rug pull / honeypot verdict (SAFE/CAUTION/RISKY/DANGER) from on-chain data, a tagline, a short explanation. Deterministic fallback if Claude is slow, honestly labeled. GET /token-card/sample.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
X1 wallet threat report, per call: pass ?wallet=<address> and get that wallet's blacklist status, its links to known rug operators and the live alerts against it. Same answer the 5 XNT subscription gives, but priced per lookup so you do not have to commit — pay in USDC on Arc, Base or Solana, or XNT on X1.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
The X1 Agent Registry (ERC-8004 for SVM, which APEX deployed on X1 on 27 Sep 2026), in full: every registered agent with its owner, registration file and the live check of every endpoint it lists (MCP handshake, A2A card, x402 paywall and the networks it accepts, web), whether it can be paid on X1, feedback counts and the registration transaction. Rescanned every 30 minutes; the answer states its age and the count, which is small because the registry is new.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
OpenAI-compatible chat completion for $0.002: gpt-oss-120b by default, or gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b. POST {model, messages}; up to 1,024 output tokens, tools supported, no streaming. OpenAI-compatible chat completion (gpt-oss-120b default; gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b). POST {model, messages, max_tokens<=1024}.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Consumer product recall search: official US safety recalls matching any product keyword — hazard type, injuries reported, affected models, remedy offered, recall date, and the official notice link — newest first as trimmed structured JSON. Check a product before buying, reselling, or recommending it; poll a keyword to catch new recalls. Optional since-date filter.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Rulemaking alert feed for agents: query any industry term and get the most recent official regulatory documents touching it — what stage each is at, which agency issued it, and where to read the full text. Poll it to catch proposed rules during their public-comment window.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Metric-imperial conversion API: miles↔km, lb↔kg, °F↔°C, gallons↔liters and 100+ more units, one call, exact factors. Deterministic and auditable — cheaper than burning reasoning tokens, zero arithmetic-hallucination risk, and the result can be cited.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Sentence embeddings (all-MiniLM-L6-v2, 384 dimensions, L2-normalized, multilingual input works best in English) for semantic search, clustering and deduplication, or rerank mode: pass query + documents to get documents sorted by cosine similarity. Runs locally, texts are not stored. Params: texts (1 to 32 strings, max 2000 chars each) for embed mode, or query + documents (up to 64) and top_k for rerank mode.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
AI token verdict built on real on-chain checks: send a token contract address (Base, Ethereum, BSC, Arbitrum, Polygon, Avalanche, Optimism) or a Solana mint and get everything from token-verdict (grade A to F, SAFE to DANGER label, 0 to 100 score, honeypot sell simulation, buy and sell tax, mint, freeze and owner powers, liquidity, shareable verdict card) plus an AI-written take for a trader: a headline, 3 to 4 plain sentences on what the grade means, red flags, green flags and which fact…
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Smart money and whale activity for a token, straight from the chain: which large wallets are accumulating or distributing right now (buy/sell USD, net, average buy and sell price, realized profit, what they still hold), who the first buyers after launch were and whether they still hold or sold everything, and how much of the volume is bots. Trades are attributed to the wallet that really received or sent the token, so Coinbase smart wallets and aggregator routes count as the real trader.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Convert a place name into coordinates and location metadata via Open-Meteo's geocoding API: latitude, longitude, country, administrative region, timezone and population. The input every mapping/weather/travel agent needs first. Use this when an agent needs to city or place name → coordinates, country and timezone.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Query live DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA) through Cloudflare's DNS-over-HTTPS resolver. Domain validation, email deliverability pre-checks and infrastructure discovery. Use this when an agent needs to real DNS records via Cloudflare DNS-over-HTTPS.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Full loan amortization: the exact monthly payment, a year-by-year principal/interest/balance table, total interest, and the effect of extra monthly payments — payoff months saved and interest saved. Deterministic mortgage math agents can quote line by line. Use this when an agent needs to full yearly schedule + extra-payment savings.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Call when an agent needs JSON-LD @type BreadcrumbList extracted from a public page or HTML (SSRF-safe). Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/profile-jsonld-breadcrumb first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Call when an agent needs the latest Ethereum mainnet block number. Send tag latest, or an empty object. Read-only eth_blockNumber on eip155:1. No spend. Send JSON {"tag":"latest"}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/eth-block-number first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Call when an agent needs anchor titles via a[title] from a public page or HTML (SSRF-safe). Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/css-a-title first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Get the latest available price for any US-listed stock: the most recent 1-minute bar close plus today's OHLCV, change, and previous close. Currently 15 minutes delayed; each response carries `is_delayed: true`. Real-time pricing lands when the data plan is upgraded. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
The exchange-reported short-interest history for a US-listed stock: total shares sold short, average daily volume, and days-to-cover for each bi-weekly FINRA settlement date, most recent first. A core short-squeeze and bearish-positioning signal. Tune how many settlements to return with `?limit=` (default 12). From x402stock, a market & economic data API (x402, USDC).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Live on-chain spot market for one Hyperliquid-listed token by symbol (e.g. HYPE, PURR) or @index: mid/mark price, previous-day price, 24h USD and base volume, circulating and total supply, and market cap, quoted in USDC. Spot, not a perp — for funding/open interest use /api/v1/perps/{coin}; for major-coin fiat prices use /api/v1/crypto. From x402stock, a market & economic data API (x402, USDC).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
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.