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Showing the 22,122 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 83,539 listings in all: 21,340 charge, 841 answered without asking, 9,707 did not reach a working endpoint, and 51,651 we have never knocked on. Type something above to search all of them.
USDC balance of any address on Base — the x402 settlement asset (atomic + USDC). Pay-per-call via x402. An empty body is answered for the wallet that pays on Base (the payment's signer); send {"address":"0x…"} for any other address.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Arbitrum ERC-20 token transfer history - decoded Transfer events, filterable to one wallet
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Native ETH balance of a OP Mainnet wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from OP Mainnet.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
EPSS Score Lookup - Call when you are triaging a vulnerability and need to know how likely it is to be exploited in the next 30 days. Send the CVE id. Returns the EPSS probability and percentile from FIRST's dataset, so a backlog can be ranked by real-world risk rather than CVSS alone.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-23.
Identify what lives at a OP Mainnet address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Validate tool output against a bounded top-level JSON Schema subset
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Current OP Mainnet gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
IETF RFC lookup by number: title, authors, publication date, status (Internet Standard, Proposed Standard, Informational...), page count, obsoletes/obsoleted-by/updates relations, keywords, abstract, and links to the HTML/text versions. Protocol-spec navigation for engineering agents. $0.01 per RFC.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Whale exchange netflow signal: on-chain whale transfers (>= $100k) on Ethereum, Base, Arbitrum, Polygon and Solana classified with exchange wallet labels as EXCHANGE_INFLOW_BEARISH (to an exchange), WHALE_ACCUMULATION_BULLISH (exchange to private wallet), INTERNAL_EXCHANGE_SHUFFLE (excluded) or UNLABELED, with per-token inflow/outflow/net USD and a signal, plus a perps section with Hyperliquid whale taker flow per coin. Params chain (all|ethereum|base|arbitrum|polygon|solana|hyperliquid), token
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Share of ESA WorldCover 2021 pixels classified as cropland. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Everything an agent needs to plan a trip to one country, in ONE call: visa requirements, customs duty-free allowances, tipping customs, power plugs and voltage, emergency numbers, tap water safety, SIM/eSIM options, public holidays during the stay, currency and payment culture, tourist taxes, driving side and IDP rules. 178 countries, government-sourced. Cheaper than 15 single calls. Example: /api/v1/kit/travel/JP
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
minia2a service: x402-crypto-price
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Latest available Poland reserve buffer plus a comparable annual history from the World Bank World Development Indicators API, with source, lag and revision caveats. Purpose: Give an autonomous agent a normalized, directly sourced Poland reserve buffer series without forcing it to understand World Bank indicator codes or response shapes. 24-hour freshness target; missing evidence is reported explicitly rather than invented.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Scan a dependency manifest for known-vulnerable and confirmed-malicious packages. POST /v1/scan with a link to a lockfile on GitHub, GitLab or Bitbucket, the file pasted in, or a components array, and get per-dependency verdicts (malicious, vulnerable, suspicious, clean) from OSV.dev and the OpenSSF Malicious Packages feed. Pay per request in USDC; no account, no API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
A pay / review / do-not-pay verdict before sending funds: account type, funding, activity, and risk, phrased as a decision an agent can act on. Optional ?amount=<usd> context.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Does the domain's SPF record authorise xero to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for xero's include/ip mechanisms, returning yes/no, the matching mechanism and the full record. Confirms a vendor integration is wired for deliverability, or spots an unexpected sender. $0.01 per lookup.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Runs the pinned OpenSSL build against a submitted certificate request and answers two questions a registration authority has to settle before it signs anything: does the request carry a valid self-signature over its own body, and what exactly is being requested. The reply names the subject, the public key parameters and every requested extension as OpenSSL parses them, so a policy check compares against the parsed request rather than the text an applicant supplied.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Purpose-bound Google Universal Analytics observation (analytics) using the existing fresh Stack-Monitor. Returns stack_universal_analytics_decision, direct versus inferred status, evidence, optional version difference against a caller-owned baseline and reusable snapshot. Missing fingerprints do not prove absence. No background scheduling, CVE, compatibility or installed-extension inventory. Existing outbound safeguards remain in the injected motor. One public HTTPS root domain, up to150 baselin
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Inspect payload, destination, secrets and size before an agent sends data to a tool or API
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Schema extraction - send a URL and the fields you want (for example price, title) and get a JSON object back
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Primary ENS name of an address (Ethereum mainnet). Use to display a human-readable name for a wallet. Input: adresse. If the address has no primary name, the response is 200 with name: null.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Use when an agent must tell if interest in a topic is rising or fading: Wikipedia, Hacker News and news over time. Topic trends and attention over time: Wikipedia page views per language, Hacker News and news mentions with change and spike days (public signals, not Google Trends; utilpeek by Tanod).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Distance2d
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Theme in Three Movements — Historical fiction about slavery and freedom for understanding liberation narratives and agency.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Mean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Greece; results outside it are rejected before payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Renders a chart from inline data (CSV, TSV, JSON or row values) and returns it as static SVG, or a complete HTML document, inside a JSON object. POST /v1/chart with either a full Vega-Lite v6 spec or the shorthand form (type, x, y, color, ranges, colors, theme). Every data mark carries a native tooltip, so nothing is scripted. Pay per request in USDC; no account, no API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Prüft am Objekt formular den Befund vorhandenen Einwilligungszustand.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Takes a cipher policy in OpenSSL syntax and resolves it into the concrete list of TLS 1.2 cipher suites that the pinned build would actually offer, in the order it would offer them. This closes the gap between a policy string in a configuration file and what a server ends up negotiating: aliases expand, exclusions apply, and suites below the build's security level drop out silently in normal operation. Here they simply do not appear in the list, and the count says how many survived.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Read a web page as clean LLM-ready markdown (main content, no nav or scripts) for research, RAG and summarization. Respects robots.txt.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Bulk is dns hosted by kinsta: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
CNAME record of community.<domain>: looks up the community host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like community without enumerating subdomains. $0.01 per lookup.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
US macroeconomic time series as stable JSON: CPI, unemployment, payrolls, GDP, and rates, with alias sets. POST /v1/us with a {series} and get the observations as one JSON object. Deterministic per source vintage. Pay per request in USDC; no account, no API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Prüft am Objekt sitemap den Befund HTTP-Status der Sitemap.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Prüft am Objekt robots-datei den Befund Vorkommen in der Sitemap.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Token holder concentration computed from raw Solana RPC: top-10 holder share of supply, largest holder share, which top holders are labelled exchange wallets, non-exchange concentration and a low / medium / high concentration verdict with reasons, plus the top 20 holder wallets. Solana SPL tokens only (pass the mint as address); EVM chains are not supported yet. Cached 10 min; no charge on RPC failure or unknown mint
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
utilpeek (Tanod) NHTSA safety recalls of a vehicle by make, model and year or by VIN (US-market data). Use when an agent must list the NHTSA safety recalls of a US-market vehicle by make, model, year or VIN.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
A large spider web is partially visible among dense green foliage in a shaded woodland. The web is camouflaged by leaves and debris in the...
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Pay-per-call: true402 Token Dossier — full pre-trade report
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Search 250M+ scholarly works (OpenAlex — successor to Microsoft Academic Graph). Pass `search` and/or `filter` (comma-joined, e.g. from_publication_date:2024-01-01,is_oa:true,cited_by_count:>100), optional `sort`, `page`, `per_page`. Returns metadata + abstracts + citation counts + OA links. The citation-graph layer kadec0/papers lacks.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-23.
Detect upgradeable proxies: EIP-1967 transparent/UUPS, beacon, EIP-1822, ZeppelinOS, EIP-1167 clones and Safe-style proxies, returning implementation, admin and beacon addresses. Use for audits and to fetch the real ABI.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Decode a 3-character World Manufacturer Identifier (the first three characters of a VIN) to the assigning manufacturer. Returns full manufacturer legal name, common short name, make, vehicle type, and the date NHTSA published the assignment. Useful for partial-VIN analysis — crash reports, damaged-vehicle photos, fleet records — where only the WMI is recoverable. Backed by NHTSA.gov vPIC; data is public-domain US government records.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
UK corporate insolvency notices. The latest corporate insolvency notices from The Gazette (official UK public record) — winding-up petitions and orders, administrator, receiver and liquidator appointments, moratoria, and creditor notices, company-level facts only. 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.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
One XRPL transaction, with its result code explained — Genesis402 / UnyKorn Operator Network
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
MIME (content) type for a file name or extension, e.g. report.pdf → application/pdf, and whether browsers usually display it inline. Use when uploading or serving files.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Share of ESA WorldCover 2021 pixels classified as built-up. The coordinate is validated against the Natural Earth boundary for Romania; results outside it are rejected before payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Who pays my x402 API, and do they come back? Customer analytics for an x402 seller from USDC payments on Base: repeat buyers versus one-off and sweep-like payers, revenue per payer and weekly retention cohorts. Use when an agent needs payer analytics for a pay-to address. Agoranome pledges 15% of settled revenue to a cause, verifiable at /impact/ledger.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Look a company up in GLEIF, the global Legal Entity Identifier register: LEI code, registered legal name, entity status, registration status, jurisdiction and address. The register's own name filter is a token search that returns thousands of unrelated rows, so matches are re-checked here and only an exact one — or one differing solely in legal form (Inc/Ltd/GmbH) — is reported as found; the rest come back as candidates.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Validate an EVM address, return EIP-55 checksum, optionally compute CREATE/CREATE2 contract address. Query: address, [deployer, nonce | deployer, salt, init_code_hash].
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Latest observation for a US coordinate: temperature, conditions, wind, humidity, pressure and visibility, from the nearest NWS station.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Weekly seller rates, all published rows, JSON. Realised seller premiums against the ECB reference for every ISO week since the first Base fill, per route and per currency. Route-weeks that fail the publishing rules keep only the reason; a currency-week aggregates only that week's published routes, so it never reveals a withheld one.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
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.