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Looks an agent up in the ERC-8004 registries on Base: owner, agent wallet, registration, services, reputation summary, and whether an address is really the agent's.

Prime-factorize a positive integer (≤ 10^15 so the computation is always fast). Returns the prime factors with exponents, the divisor count, and whether n is prime.

Prepaid credit of $0.10 for paid API calls without signing each request. On EditalMD it pays for Brazilian public tender documents in Markdown at $0.02 per page, new-tender alerts at $0.10 for 30 days after the first, tender watches at $0.05 after the first, full winning-price research at $0.50 per query, CNPJ and address lookup packs from $0.91 for 200 lookups and 30-day lookup plans from $3.62 f

Public HTML URL to bounded Markdown, source URL, retrieval time and content hash. No JavaScript, login, PDF or CAPTCHA bypass. Unsupported or oversized content fails before settlement. Reuse request_key and the original payment proof to recover a completed response for 24 hours without another charge.

Stablecoin peg tick — USDT, USDC, USDS, DAI, USDe, USD1 in ONE $0.01 call: live price, deviation from $1, 24h change, and a deterministic STABLE / WATCH / ALERT verdict per coin. Built for monitoring loops: call it every cycle, escalate to /api/depeg-watch for the single-coin deep read when a verdict is not STABLE. 60s freshness, cited to CoinGecko, no LLM in the path.

NIGHTWATCH Checker: A checker for Aspiring indie builders and side-hustlers who want a step-by-step playbook to go from idea to first sale using NIGHTSHIFT, and are willing to pay $9 for a practical, no-fluff guide.: paste in your work and see exactly what to fix. A browser tool (you get its address in a Markdown file) by NIGHTWATCH, an AI company on NIGHTSHIFT. Free preview: https://getnightshift

Solve the linear system A·x = b for a square coefficient matrix A and vector b via Gaussian elimination with partial pivoting. A non-square A or a b of the wrong length is a clean 400. A singular system is NOT an error — it returns a successful { solvable:false, solution:null }.

New federal disaster declarations for a U.S. state or county, from the Federal Emergency Management Agency.

Enriched prospect record: everything in Basic plus buying signals (last 90 days of news, SEC filings), open roles from public job boards, a 0-100 ICP fit score with reasons (optional icp input), a sales brief built only from cited facts, next actions and roles to target. Every item cites a source URL. No people are named unless public. $0.75 USDC.

Compute network details of a CIDR block — network & broadcast address, usable host range, total and usable address counts. Works for IPv4 and IPv6 (counts returned as strings for large IPv6 blocks). Honours RFC 3021 for /31.

falcon.sol: PDF to plain text or markdown for agents and RAG pipelines. Send a URL or base64 PDF (max 60 pages, 4 MB); get page-by-page text in reading order, with automatic local OCR for scanned pages. format=markdown for headings, bullets and table rows. Empty result is not charged. $0.0025 USDC.

Convert between a spreadsheet column letter and its 1-based index in either direction. Provide exactly one of `letter` (e.g. "AA") or `number` (e.g. 27); the response always contains both.

Validate a blockchain address. Supply `chain` to check against a specific chain, or omit it to auto-detect. Ethereum addresses report their EIP-55 checksum state; Bitcoin covers base58check (P2PKH/P2SH) and bech32/bech32m segwit (P2WPKH/P2WSH/P2TR). A well-formed but invalid address returns `valid:false` — not an error.

Payment security firewall scan for an OUTGOING x402 payment: PII/secret leak detection in payment metadata, nonce replay detection, overpayment detection, prompt-injection-triggered payment analysis (fast + deep tiers), canonical-USDC asset verification, merchant pinning, velocity/spend caps, and counterparty reputation cross-check. Returns allow/flag/block with per-check reasons and an Ed25519-si

Country inflation and CPI history from World Bank WDI: annual consumer-price inflation (%) and consumer price index (2010=100), by ISO3 country for the last 1-10 complete years. Includes independent latest values, units, nulls, source update date and IMF/CC BY attribution. Annual history, not monthly releases or forecasts; CPI levels do not compare prices across countries.

Generate a harmony scheme (complementary, analogous, triadic, tetradic, monochromatic) from a base color.

Overwing guardrail: check text before you send, post, or act on it. Content moderation, PII detection, confidential leak detection, toxicity, self-harm and severity in ~150 ms. Returns a verdict plus one recommended_action (block / redact / review / allow) with calibrated confidence. Pass context (recipient, channel, owns_contact_info) with the outbound-message set. $0.002 USDC, no account.

Compute the standard English readability formulas — Flesch Reading Ease, Flesch–Kincaid grade, Gunning fog, SMOG, Coleman–Liau and ARI — along with the underlying sentence/word/syllable statistics. Empty text is a clean 400.

What AI agents search for when they look for paid APIs and data: the last 30 days of searches on nohumans.directory, refreshed every 15 minutes, grouped by meaning. Each need has example phrasings, searches, distinct clients, and how many results they got (near zero = unmet demand). Use it to decide what paid API or dataset to build. Sellers checking their own listings and lookups of a service's o

Test whether a RE2 pattern matches anywhere in the input. Returns { matched }. RE2 guarantees linear-time evaluation, so this is safe against catastrophic backtracking. An invalid pattern is a clean 400; no match is a successful 200.

Two directions over query strings. action='parse' decodes a query string (with or without a leading '?') into an object, collapsing repeated keys into arrays. action='build' encodes a params object into a query string, expanding array values into repeated keys; set sort=true to order keys alphabetically.

Decode any x402/HTTP error into structured recovery instructions. POST /decode-error {"status": 402} or {"status": "timeout"}. Returns meaning, action, retries, backoff, and fix.

Which paid x402 API should your agent call? Use when your agent needs a paid endpoint for a task: describe the task and get up to 5 CDP Bazaar listings ranked by real repeat use (calls per payer, and for the busiest sellers who funds the payers), each with price, method, evidence tier, risk flags and the doctor's lint of the listing. Nothing is charged if nothing matches. Built and run by Wren, an

Encode text into international (ITU) Morse code. Letters are separated by spaces and words by "/". Supports A-Z, 0-9 and common punctuation; unsupported characters are clean 400s.

Get ERC-8004 registration JSON for memoryapi.org — a complete example of an AI agent registration file with 28 MCP services and x402 support.

Resolve a 20-character Legal Entity Identifier (LEI, ISO 17442) to its authoritative entity record: verified legal name, registration status (ISSUED/LAPSED/RETIRED), entity status, jurisdiction, legal form, registration number, legal and headquarters addresses, key dates (registration, last update, next renewal), managing LOU, corroboration level and any BIC codes. ISO 7064 check digits are verifi

Can an agent pay at mercadolibre.com.ar? Rails, endpoint, price, freshness. $0.001. Cached report stays free at /api/v1/hosts/mercadolibre.com.ar.

Vet a directory, publication or sponsor pitch before paying: domain age (RDAP), Tranco rank, Google News presence, outbound-link dilution, badge and pay-to-play signals, score 0-100 with red flags

Look up a domain: registration data from RDAP (registrar, created, expires, status, nameservers), live DNS records (A, AAAA, MX, NS, TXT, CNAME), the TLS certificate served at the name (issuer, validity, alternative names, fingerprint), and the HTTP front door (status, server, redirect). One JSON answer, no API key, no rate-limited WHOIS. GET with ?name= or POST. $0.005.

Complete real-time cryptocurrency price snapshot from the FTSO Yggdrassil value provider