Every agent-payable API.

Full rate snapshot on a historical fixing date back to 1999 — month-end revaluation staple; weekend dates substitute the prior fixing, flagged

Genuinely fascinating fun fact about science, history, nature, or the universe.

Fact-check a claim against the live web. Searches with Tavily and Exa, reads the best page with Firecrawl, and returns a verdict (supported, contradicted or unclear), a short explanation and source URLs. Typical response 4 to 8 seconds. If it cannot answer in time you get an error and are not charged.

Fact verification API for market data — cross-check a ticker against live provider evidence and return an evidence-backed result instead of guessing.

Faction brief generator: Create a playable faction with a public aim, hidden need, and rival.

Compare 2 to 5 Dutch addresses in one call, in English: liveability, police-registered crime, average home value, floor area, year built, distances to train station, supermarket, primary school and GP, ground height, plus the best address per metric and the full report for each. For relocation and house-hunting agents. Input: addresses separated by ';'.

Dutch address report in English: building (year built, floor area, use), neighbourhood (residents, age mix, home values, income, energy use), distances to 18 amenities (GP, supermarket, schools, train station), police-registered crime vs national rate, listed monuments, and Leefbaarometer liveability percentiles. Input: postcode + house number. Sources: BAG, CBS, Politie, RCE, Leefbaarometer.

Dutch licence plate check in English: make, model, APK (MOT) expiry, insurance, open recalls with details, RDW odometer verdict, full APK inspection history with defects found, import/taxi/export history, specs, power, CO2, catalogue price, and risk flags. Input: Dutch licence plate. Source: RDW open data.

Dutch neighbourhood profile in English for any postcode or CBS neighbourhood code: residents and age mix, housing and home values, income, energy use, distances to 18 amenities, police-registered crime vs the national rate, and Leefbaarometer liveability. No exact address needed. Sources: CBS, Politie, Leefbaarometer.

Read a single XBRL financial concept for a company (by CIK or ticker) from its as-filed statements. Give the concept's XBRL tag (e.g. Revenues, NetIncomeLoss, Assets, EarningsPerShareDiluted) and optionally the taxonomy (default us-gaap, also dei). Returns the label and, per unit (USD, shares), recent datapoints with period end, value, fiscal year/period, form, filing date and accession. Bounded, as-reported output.

Fall damage calculator: Estimate fall damage after a configurable safe height.

The Family Office Knowledge Graph index of record for $0.01 USDC — every node's record list (LEI, legal name, aliases, register ids, field states, as-of) as a signed statement (EdDSA, kid fo-kg-x402-2026-09) with a receipt that resolves forever at /x402/receipt/{nonce}. Operator: Agentic KG Holdings.

Weights likes, comments, shares, saves and clicks, divides by supplied reach, and reports cohort and aggregate points per thousand reached accounts. It does not access a platform, distinguish authentic from manipulated activity, measure sentiment or predict revenue.

Fantasy quest titles: Short quest titles for journal entries and mission boards.

Fixed-price chat completions for glm-5.3-flash on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.008/1M input tokens, $0.028/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.

[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC on Base using x402 (upto scheme, true-up billing): the 402 quotes a spending CAP (estimated input tokens + your max_tokens at the model's per-1M price), and after the model answers you are settled for the ACTUAL usage — always <= the cap, never more. Minimum $0.001, cap $3.0 per call. Cached input bills at 10%. Failed calls are never charged. Any model from GET /v1/models.

Fixed-price chat completions for deepseek-v4-pro on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.037/1M input tokens, $0.111/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.

[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC on Base using x402 (upto scheme, true-up billing): the 402 quotes a spending CAP (estimated input tokens + your max_tokens at the model's per-1M price), and after the model answers you are settled for the ACTUAL usage — always <= the cap, never more. Minimum $0.001, cap $3.0 per call. Cached input bills at 10%. Failed calls are never charged. Any model from GET /v1/models.

Fixed-price chat completions for gpt-5.5 on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.020/1M input tokens, $0.120/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.

Fixed-price chat completions for glm-5.2 on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.011/1M input tokens, $0.035/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.

M2M: Input fid or wallet. Output followers, following, clusters, funder_address, is_farm via Neynar. For KOL tracking, airdrop sybil filter, copy-trading vetting. Pay-per-call $0.01 USDC Base eip155:8453

Fetch one Farcaster cast by hash or warpcast.com / farcaster.xyz URL. Returns the compact cast: author (fid, username, follower count), text, timestamp, channel, parent hash, likes, recasts, reply count, embed URLs. Use to resolve a shared link, verify a quote, or enrich a cast hash from another tool.

The reply thread under a Farcaster cast (by hash or URL): the root cast plus replies flattened with their depth (1-5 levels) and parent hash, in chronological, newest-first or algorithmic order. Compact cast shape. Use to read reactions to an announcement, summarize a discussion, or trace who replied to whom.

Search Farcaster casts by keyword (literal, semantic or hybrid match), newest first, optionally filtered to one author or channel. Returns compact casts: hash, author (fid, username, follower count), text, timestamp, channel, reactions, reply count, embed URLs. Use for mention monitoring, sentiment sampling, or finding discussion of a token, product or topic.

Cast volume over time for a search query: how many Farcaster casts matched per bucket across the last 1d, 7d, 30d, 90d or 180d (hourly or daily buckets), optionally limited to one author or channel, plus the total. Cached 60 s. Use to chart mention volume for a token, product or event and detect spikes.

Details for one Farcaster channel by id (e.g. base) or FIP-2 parent URL: name, description, follower and member counts, public-casting flag, creation date, lead and moderator fids, pinned cast. Use to validate a channel id before pulling its feed, or to size a community.

Latest casts in one or more Farcaster channels (e.g. base, farcaster, ethereum), newest first, with optional replies. Compact cast shape with author, reactions, reply count and embed URLs. Cached 60 s per identical request. Use to watch a community, sample what builders are posting, or feed a digest.

Trending Farcaster channels ranked by casting activity over 1d, 7d or 30d, with cast counts for all three windows, follower and member counts, and the channel lead. Cached 60 s. Use to spot where attention is moving on Farcaster right now, then pull the feed with fc-channel-feed.

A Farcaster user's recent casts by fid or username, newest first, optionally including replies or limited to one channel. Compact cast shape with reactions, reply count and embed URLs. Use to read what a founder, builder or KOL has been posting, or to build a per-account timeline.

Search Farcaster users by name or username fragment. Returns up to 10 compact profiles: fid, username, display name, bio, follower and following counts, Neynar quality score, primary verified Ethereum address. Use to resolve a person or brand to a fid before fc-user-casts, or to find who to follow on a topic.

Fare Pulse — cheapest live fares from a major US hub, cached snapshot.

Single-signal check: is this website's pricing machine-readable for AI agents? Detects Offer schema with price/availability and pricing-transparency signals. Returns yes/no plus underlying checks and fixes. Useful for procurement and comparison agents.

Single-signal check: does this website expose MCP / WebMCP tooling AI agents can call? Returns yes/no plus the underlying checks (MCP endpoint, WebMCP tools, agent skills) with fixes. Cheapest way to answer one integration question about a site.

Fast answer grounding gate

Fast claim grounding gate

Fast sentiment analysis of text.

FastAPI Latest release summary: Live PyPI latest release summary for FastAPI. Package name can be overridden.

FastAPI Recent release history: Live PyPI recent release history for FastAPI. Package name can be overridden.

MSHA mining fatalities feed, newest first, including OPEN preliminary notices (scraped 32–180 days ahead of the official dataset and flagged as preliminary). Filter by date, state, commodity.

MSHA mining fatalities feed, newest first, including OPEN preliminary notices (scraped 32–180 days ahead of the official dataset and flagged as preliminary). Filter by date, state, commodity.

FaultCode Diagnostics - lookup_dtc. $0.005 USDC per call. Source-attributed definitions for one P/B/C/U code, plus its real appearances in official manufacturer documents when no definition exists. Charged only when the catalog returns a definition or document evidence: a code it has neither of is answered in full and costs $0.

Call when an agent needs favicon and apple-touch icons extracted from a public page or HTML (SSRF-safe). Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/favicon-meta first.

Which medical devices did the FDA just clear or approve, and who is the applicant? Bulk feed over openFDA 510(k) clearances and PMA approvals, newest-first by decision date — a new clearance is a device launch. Cursor-paginated up to 1000/page, filterable by applicant, state, product code, pathway (510k/pma), advisory committee, or since. Rows carry the applicant, device name, product code, advisory committee, pathway, and decision. Observational public records, never a recommendation.

Which drugs did the FDA just approve, and who is the sponsor? Bulk feed over openFDA Drugs@FDA approvals, newest-first by approval date — a new approval or supplement is a commercial-launch moment. Cursor-paginated up to 1000/page, filterable by sponsor, submission type (ORIG/SUPPL), marketing status, or since. Rows carry the sponsor, application number/type, brand names, active ingredients, dosage/route, and marketing status. Observational public records, never a clinical recommendation.

FDA drug approvals: which companies just won FDA approval for new drugs, generics or biologics, from Drugs@FDA. Approval date, sponsor company, NDA/ANDA/BLA type, brand and active ingredients, dosage form, review priority, and a flag for novel drugs (new molecular entities). Filter by company, days and original vs. supplemental approvals.

FDA drug label: indications, dosage, warnings, boxed warning, contraindications — Genesis402 / UnyKorn Operator Network

FDA drug label lookup: boxed warning, approved indications, contraindications, warnings and drug interactions for any drug, plus brand and generic names, manufacturer and route, as clean structured text from openFDA. Not medical advice.

FDA drug recalls and food recalls: the latest FDA enforcement reports with recall class (Class I is most serious) explained in plain language, recalling firm, product, reason, status, dates and distribution. Filter by class, company and time window. openFDA data, not medical advice.

FDA drug shortages: which medicines are in shortage now, grouped by drug, with availability (unavailable or limited) per package, companies, dosage forms, shortage reasons, estimated recovery notes and posting dates. Search one drug or list current shortages. For hospitals, pharmacies and supply chains. openFDA data, not medical advice.

FDA recalls and enforcement reports: food, drugs, devices — Genesis402 / UnyKorn Operator Network