Every agent-payable API.

Withholding and net take-home on a bonus/commission using the 2026 federal supplemental-wage rate (22% flat; 37% on cumulative supplemental wages over $1M), plus FICA and an optional state supplemental rate.

Retrieve the full text of one chapter from an indexed book by book_id and chapter number. Chapter 0 is front matter before the first detected heading. Use /book-metadata first to see a book's valid chapter range. No license, no API key required.

Look up full metadata for one indexed book by book_id: title, author, year, subjects, bookshelves, download rank, chunk count, and detected chapter range. Use book_id from /book-search or a category shelf. No license, no API key required.

Deterministic daily book pick from the indexed corpus, date-seeded so every caller gets the same answer on the same day. Optional date override for backfill. Returns book_id and drill-down routes. No license, no API key required.

Get notable passages from one indexed book by book_id. Pass an optional theme to full-text search within that book, or omit it for a sample of short dialogue-bearing passages. Returns real excerpts, never generated or paraphrased. No license, no API key required.

Search the indexed public-domain book corpus by title or author substring. Returns matching books ranked by historical popularity with book_id for drill-down into metadata, chapters, quotes, or full-text search. No license, no API key required.

Book search over Open Library: title, authors, first publication year, subjects, ISBNs and edition count

Book imbalance (bid_size-ask_size)/(bid_size+ask_size). Call when sizing or signal needs L1 size imbalance. Returns imbalance in [-1,1] as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Booking intent creation

Booking.com Hotel Search API — real active Booking.com listings for a destination: nightly price, rating, property type, address. Real-time, no login. SEO: Booking.com API, hotel price API, hotel search API, accommodation data.

Boolean AND of two coerced values. Call when you combine agent preflight gates. Returns AND result for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Boolean NOT of a coerced value. Call when you invert agent gate flags. Returns negated boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Boolean OR of two coerced values. Call when you combine optional agent success signals. Returns OR result for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Boon chronological per-handle boon list

Boon recognized x402 endpoint directory

Boon x402 endpoint recognition graph

Does this Boston address have building and property code violations? Query street number + street name and get case numbers, codes, status, and descriptions from Analyze Boston. For tenant screening and landlord diligence. Input: address string. Output: JSON, live City of Boston open data.

Bot Fuel — $0.25 entry for spend-capable wallets. Top Polymarket↔Kalshi gap + net-edge. Scale via pack/day.

BotPay /go access on Base USDC

BotPay /pay access on Base USDC

Botpay NFT minting API access

Extract a buyer-defined flat schema from public sources with field-level citations and explicit unknowns.

Bin-packing heuristic — deterministic best-fit-decreasing capacity planning for placing items into bins, with feasibility evidence and an honest volume bound.

Assignment solver — exact minimum-cost worker-to-task matching for resource allocation, with deterministic choices and a primal/dual optimality certificate.

Weighted interval scheduling solver — exact maximum-weight compatible job scheduling with half-open intervals and a complete dynamic-programming certificate.

0/1 knapsack solver — exact work-bounded capacity planning and portfolio selection for maximum value, with deterministic ties and reproducible DP evidence.

Bounded accountless Base mainnet ERC-20 transfer and log search by address, direction, asset, counterparty and time window

Bounded eth_getLogs on Base (≤5 block span, ≤50 logs) for $0.002 USDC.

Bounded read-only eth_call on Base for $0.002 USDC (max 4KB data/response). Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Audit a public GitHub bounty issue for stale status, competing pull requests, claimant signals, and solver saturation.

Poster-only: approve a submitted bounty result: POST {id}. Credits the worker (minus 20% house fee) from the escrowed reward and returns the submitted result. Completes the post→claim→submit→approve loop.

Poster reclaims the reward of a bounty nobody completed: POST {id}. Full refund, no fee. Poster-only. Works while OPEN, or while CLAIMED-but-stale (the claimer ghosted past the claim TTL). Not once a result is SUBMITTED — approve that instead.

Claim an open bounty to work on: POST {id}. Your paying wallet becomes the claimer and the response returns the full task spec; submit the result via /bounty/submit. One claimer per bounty.

Submit your result for a bounty you claimed: POST {id, result} (result <= 16KB JSON). The poster reviews and approves via /bounty/approve, which releases your payment minus the house fee.

Search the web from Brave's independent index.

Search recent news results from Brave Search.

Brazil IPCA consumer inflation: last 12 monthly readings and 12-month accumulated. Central Bank of Brazil.

Official PTAX USD/BRL exchange rate (the reference rate used in Brazilian contracts). Central Bank of Brazil.

Fast sanctions/debarment screen for a Brazilian CPF or CNPJ against the CEIS list (companies and individuals barred from contracting with the public sector). Official CGU/Portal da Transparência data.

Brazil SELIC policy interest rate, current target and recent history. Central Bank of Brazil.

Full company dossier for a Brazilian CNPJ: legal name, registration status, shareholders/partners (QSA), main and secondary business activities (CNAE), share capital, address — plus an automatic sanctions screen against the CEIS debarment list. Built for KYB / due-diligence. Official Receita Federal and CGU data.

Brazil macro snapshot in one call: SELIC policy rate, CDI, IPCA inflation (monthly and 12-month), official PTAX USD/BRL. Source: Central Bank of Brazil (BCB).

Focus report: median market forecasts from ~100 institutions for Brazil IPCA, SELIC, GDP and USD/BRL.

Does this CNPJ exist in the official Receita Federal registry, and is it active? Returns existence, registration status (situacao_cadastral: Ativa=active, Suspensa=suspended, Baixada=closed) with date, headquarters/branch flag and state. Cheapest paid check in the catalog: digit arithmetic alone cannot tell a well-formed number from a real, active company. Free sample, no payment: https://api.brazilayer.com/v1/cnpj/amostra

Causal chain for soybeans: consecutive dry days in the Mato Grosso belt (leads yield and shipped volume by months) → forecast rainfall in MT and the South → soybean volume actually exported last month from the official trade registry → year-over-year change. Brazil is the largest soybean exporter; this is the physical and trade side of global supply, not a price feed. Free sample, no payment: https://api.brazilayer.com/v1/cadeias/amostra

Causal chain for arabica coffee: minimum temperature forecast 72h ahead over the southern Minas belt (frost is the event that historically moves KC hardest, operational threshold 3 °C) → consecutive dry days stressing flowering → observed rainfall → the official BRL/USD rate that converts the international price for the grower. Brazil is the top arabica exporter. Physical signal only — bring your own price. Free sample, no payment: https://api.brazilayer.com/v1/cadeias/amostra

Causal chain for Brazilian capital flight pressure: the live premium paid for USDT over the official central-bank rate (leads perceived FX stress by hours to days) → where institutional money actually moved, net flows into fixed income versus equities across the R$ 13.8tn fund industry → the official PTAX rate. Two independent signals, one reading: are locals paying up for dollars while funds turn defensive? Free sample, no payment: https://api.brazilayer.com/v1/cadeias/amostra

Causal chain for Brazilian power risk: forecast rainfall over the Southeast/South (leads reservoir levels by ~2-4 weeks) → stored hydro energy per subsystem and its 7-day slope, from the grid operator → likelihood of thermal dispatch and cost pressure. Brazil runs on hydro: this is the upstream of industrial energy cost, and the rule and its limits travel in the response. Free sample, no payment: https://api.brazilayer.com/v1/cadeias/amostra

Daily fire hotspots across Brazil from the official INPE satellite program: count and mean intensity (FRP) by biome (Amazon, Cerrado, etc.) over the last 7 days, leading states, plus mean days-without-rain at fire locations — a drought proxy. Signal for ESG screening, carbon markets, cattle and soy supply-chain risk. Free sample, no payment: https://api.brazilayer.com/v1/commodities/amostra

Monthly Brazilian export volumes and FOB values for the commodities Brazil dominates: soybeans, corn, coffee, sugar, beef, chicken, cotton and pulp — from the official ComexStat registry, with year-over-year volume change per month. Brazil supply shifts move CBOT and ICE prices; this is the official record of what actually shipped. Free sample, no payment: https://api.brazilayer.com/v1/commodities/amostra