Every agent-payable API.

Pay-per-Training-Provenance: an agent pays to seal the provenance of a dataset or training run — a C2PA-compatible manifest binding the dataset/artifact hash to a declared origin, served with a post-quantum ML-DSA-65 / Dilithium-3 (NIST FIPS 204) signature over the same canonical claim (manifest anchor: Dilithium-3). Built for EU AI Act Art. 10/53 training-data provenance. Privacy-preserving (only the hash is bound). x402-native.

Pay-per-Verify: an agent pays $0.01 to verify a post-quantum (ML-DSA-65 / Dilithium-3 or Dilithium-2, NIST FIPS 204; scheme auto-detected by size) signature over a message against a public key. A generic machine-to-machine PQC proof primitive for autonomous agents. x402-native.

FractalAI Notary: pay for an independent ML-DSA-65 attestation of an x402 settlement.

Add, subtract, multiply or divide two fractions and return the exact, fully-reduced result. All computation is done in BigInt so there is no floating-point error. Dividing by a zero fraction is a clean 400.

Expand a fraction to its decimal form by exact long division, detecting a repeating cycle and rendering it in parenthesis notation (e.g. 1/6 → '0.1(6)', 1/7 → '0.(142857)'). maxDigits caps a non-repeating expansion. A zero denominator is a clean 400.

Frame Ancestors Check: Frame Ancestors Check checks whether a CSP frame-ancestors directive contains a required source from bounded caller-supplied values without an external provider. Call Frame Ancestors Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Frame Ancestors Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party,…

France 500 MB: a prepaid travel eSIM with 500 MB of data for 1 day. Buy it when a traveller needs mobile data abroad without a local SIM card or roaming fees. Pay in USDC on Base with x402, no account or API key needed. The installable eSIM (QR code, LPA activation code, one-tap iPhone and Android links) is ready within seconds from order_status_url. Optional JSON body: quantity (1 to 20) and email.

Hire the Town. Outsource a task to AI agents on the Frantic bounty board. Describe the work, the deliverable, and the acceptance criteria, then fund the bounty with Base USDC in the same call. Agents claim it, submit their artifacts in the open, and are paid only when delivery is accepted. Every claim, judgment, and payout is sealed to a receipt ledger anyone can verify. New postings are screened before they reach the board.

FRED economic time series as JSON (Fed funds, CPI, unemployment, etc.)

FRED economic data API. Fetch the latest official Federal Reserve economic-series value and metadata by FRED series ID.

Free Action & Adventure Fiction audiobooks: public-domain recordings in LibriVox's "Action & Adventure Fiction" genre (1021 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free audiobooks on "Americans": public-domain recordings (LibriVox and Internet Archive audio) whose subject tags match, with runtime, language and mp3 links, most downloaded first. Add words to narrow. $0.01 per page of 20.

Free Detective Fiction audiobooks: public-domain recordings in LibriVox's "Detective Fiction" genre (595 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free Essays & Short Works audiobooks: public-domain recordings in LibriVox's "Essays & Short Works" genre (659 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Freelancer Commission calculator: Calculate a commission and remaining amount from a supplied rate. Tailored for freelancer workflows.

Freelancer Discount calculator: Calculate savings and discounted price. Tailored for freelancer workflows.

Buy a prepaid Freeland travel eSIM. The x402 payer becomes the owner.

Extract fresh structured JSON from a public webpage.

Fresh, dated news results via Google News: title, link, source, publish date. Distinct from general web search — time-ordered and news-scoped. For monitoring and briefings.

Check whether a web page has materially changed while filtering common page noise and updating its Fresh402 snapshot.

Verify a factual claim against fresh web evidence.

Freshness-tiered pricing: gas price + ETH/USD price, same data either way. ?freshness=cached ($0.002) serves the last known values with no network call; ?freshness=live ($0.02) forces a guaranteed-current fetch right now.

Convert a Julian Day Number back to a proleptic-Gregorian date, with the ISO weekday (1=Monday..7=Sunday) and its name.

Use to check whether a commercial building budget in the Rio Grande Valley, Texas is in line: median and 25th-75th percentile of filed estimated cost per square foot over the last 24 months, by county (Hidalgo, Cameron, Starr, Willacy) and type of work (new construction, renovation, addition), with n. For estimating, appraisal and lending checks. Filed estimates, not bids. Example: "What does new commercial construction cost per square foot in Hidalgo County right now?"

Use when you need building-permit activity for Rio Grande Valley cities (McAllen, Edinburg, Pharr, Mission, Weslaco, Brownsville, Harlingen and others) by ISO week and permit class, to judge local construction demand before a lending, supply or market-entry decision. DARK means the city did not publish that week.

Use when you need the recent direction and level of construction inputs priced for South Texas: framing lumber, studs, OSB, drywall, rebar, copper, Gulf Coast diesel, the 30-year mortgage rate and construction PPI. Weekly, dated, ranged. Not a bid or quote.

Use to vet a developer, owner, architecture firm or trade contractor in the Rio Grande Valley, Texas: projects filed since late 2024 (count, total and largest cost, cities, dates, newest projects) and state trade licenses held by the business (A/C, electrical, sign, elevator), current or expired. Pass part of the name (3+ characters). No match is a free 404. Example: "How many projects has this developer filed in the Valley since 2024, and how large was the biggest one?"

Use when you need a written weekly briefing on Rio Grande Valley construction (permits, materials, labor, housing supply, major projects) in English or Spanish, as structured JSON with headline, key figures, chart data and full text. Pass week=YYYY-Www for a past issue.

Use when you want to check how reliable Frontera Signal forecasts are before trusting them: every dated call with its resolve-by date and grade (HIT, MISS, PUSH or OPEN).

Use when you need construction labor conditions in the Rio Grande Valley: typical build time for a 2,100 sq ft house, the immigration-enforcement climate and construction-loan trend. Aggregated; no firm-level data.

Use when you need housing supply for the McAllen-Edinburg-Mission and Brownsville-Harlingen metros (months of supply, inventory, days on market, homes sold) by week, to judge whether the market is oversupplied before building, lending or buying.

Use when you have a Hidalgo County, Texas street address and need its parcel record before an offer, a loan or a site visit: parcel id, property class, acres, year built, building size, last deed, values, taxing units and the owner if it is a company or public body (people are withheld). /api/v1/parcel/match checks for free first; a miss is a 404 and is not charged. Example: "What is the parcel id, building size and market value of 800 S 10th St, McAllen?"

Use to find who is about to build what in the Rio Grande Valley, Texas (Hidalgo, Cameron, Starr, Willacy counties): commercial projects over $50,000 filed with the state before construction, with owner, design firm, estimated cost, square feet and dates. For suppliers, subcontractors, lenders and brokers chasing new work. Filter by city, county, since, min_cost or owner. Example: "What commercial projects were registered in Hidalgo County since Sept 1, who owns them and how big are they?"

Use to size competing or neighboring construction around one Rio Grande Valley address before you buy, lend, lease or build there: count, summed filed cost and each commercial project within radius_mi (default 1, max 5), nearest first. Hidalgo, Cameron, Starr and Willacy counties; about 68% of filings have a map point. An address we cannot place is a free 404. Example: "How many commercial projects were filed within two miles of 1201 E Capote Central Ave, Pharr, and what are they worth?"

Use when you need a quick read of the construction market in one Rio Grande Valley city (McAllen, Edinburg, Mission, Pharr, San Juan, Weslaco, Donna, Mercedes, Brownsville, Harlingen) or the whole Valley: latest permit counts, metro housing supply and home values, construction input prices, mortgage rate and labor conditions. Every value has an as-of date and its age in days.

Use to track new housing permits month by month in Rio Grande Valley cities and county areas (Hidalgo, Cameron, Starr, Willacy counties): units and buildings by structure type and valuation since January 2024, with year-to-date totals. Filter by place, county, from and to (YYYY-MM). Covers cities that publish no weekly permits. Example: "How many single-family homes did Brownsville permit each month this year?"

Use to check what common building materials cost on the shelf in the Rio Grande Valley (McAllen, Mission, Edinburg): 2x4 and 2x6 studs, OSB, drywall, concrete mix, CMU block, rebar, shingles, underlayment, housewrap, insulation, paint, doors, deck screws. Dated prices at big-box stores and a local yard, checked twice a week, for estimating or checking a bid. Not a quote. Example: "What does a sheet of 7/16 OSB cost in McAllen this week?"

Free public-domain books on "Frontier and pioneer life": browse the catalogue's works tagged with that Library of Congress subject (462 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

South African Fuel prices (Current SA retail/wholesale fuel prices: petrol 93/95 (inland & coastal), diesel 50ppm, illuminating paraffin. Rand per litre.) Clean cited JSON with official source URL, effective date and freshness flag.

Full text of one IRS Internal Revenue Bulletin document (Revenue Ruling, Revenue Procedure, Notice, Announcement, or Treasury Decision), 2003 to present. Get the id from GET /search?q=<keywords>. Use this when you need the complete, verbatim text of a specific IRS guidance document for tax research, not a summary.

Full text of one section of the SSA Program Operations Manual System (POMS). Get the id from GET /search?q=<keywords> or GET /part/:code. Use this when you need the complete, verbatim text of a specific POMS section for a disability, retirement, SSI, or Medicare question, not a summary.

Full text of one section of the FDA Investigations Operations Manual (IOM). Get the id from GET /search?q=<keywords> or GET /chapter/:id. Use this when you need the complete, verbatim text of a specific IOM section for inspection-readiness or regulatory research, not a summary.

Full text of one section of the IRS Internal Revenue Manual (IRM). Get the id from GET /search?q=<keywords> or GET /part/:number. Use this when you need the complete, verbatim text of a specific IRM section on IRS examination, collection, appeals, penalty, or disclosure procedure, not a summary.

The complete daily observation history of third-party x402 endpoints since first observation, with the Merkle root of each day. Each root is chained to the previous day and timestamped into Bitcoin via OpenTimestamps, so the archive can be verified as having existed on the stated dates rather than assembled later. The most recent 7 days are free at /v1/datasets/day/{day}; the manifest and verification method are free at /v1/datasets/manifest.

Full chain state: height, size on disk, prune flag, softforks — flat $0.001 per call, USDC on Base, no signup.

Full IPO company profile with AI research, valuation analysis, and deal terms

Full Market Report: node-operated on-chain service Executed deterministically by the AmanChain node against live consensus state (real blocks, pools, balances) — paid per call via x402, settled in USDC on Base. Input: JSON body {"serviceId":"aman-market-report","request":"<input>"}. No account, no API key.

Full RTP robot profile: capabilities, pricing, connection type.

Full scan of any website, from orbylon.com. Settles directly to the business. You are not charged if the call does not work.

Full structured invention record: concept, mechanism, materials, validation plan, sources, diagram, version history, ecosystem use.