Every agent-payable API.

Validate JSON data against a JSON Schema (draft-07, 2019-09, 2020-12) — returns exact error locations, keywords, and messages for programmatic handling. Deterministic schema validation.

Validate a UK postcode and report its normalised form, format validity, and whether it is currently active.

One-cent Base Sepolia x402 demo with Bazaar discovery and a durable operational receipt.

Validate an Ethereum address. Checks 0x-prefixed 40-hex format and EIP-55 mixed-case checksum to catch single-character typos. Returns checksummed (canonical) form. Pure algorithmic — fast and cheap.

Validate an EU VAT number: local format + check-digit prefilter, authoritative VIES check with retry and cache, durable audit receipt.

Validate an IBAN structurally: country length rules, character set and the ISO 7064 mod-97 check. Deterministic. A structurally valid IBAN is not proof the account exists, is open, or belongs to the party you are paying.

Validate an ISIN against ISO 6166: country prefix, 9-character NSIN and Luhn check digit. Structural only; does not confirm the instrument exists or is tradeable.

Validate BIC/SWIFT code format and identify the bank. Returns bank name, country, branch info.

Validate BIC/SWIFT format shape (8 or 11 alnum). Call when preflight for bank routing fields. Returns valid boolean 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.

Validate Bitcoin-base58 alphabet membership for local address hygiene — call when checking Bitcoin-base58 alphabet membership locally. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip,…

Validate IBAN checksum (mod 97) offline. Call when payment form validation without banking APIs. Returns valid boolean 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.

Validate identifiers by checksum: IBAN (mod-97), card numbers (Luhn), EAN-13, ISBN-10/13, UUID (RFC-4122), ULID. Batch up to 100 per call with per-item reasons.

Validate UUID string shape. Call when you check correlation IDs before storage keys. Returns valid 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.

Validate up to 500 identifiers in a single call — IBAN, VAT, BIC, LEI and ISIN mixed freely. One payment instead of 500, for reconciliation and onboarding runs. Same structural scope as the individual validators.

Validate a 32-byte transaction hash format and normalize casing — call when validating a 32-byte transaction hash format. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search,…

Validate a phone number and get carrier information.

Validate an IBAN number. Checks format, length, and mod-97 checksum. Extracts country code, bank identifier, and branch code. Pure algorithmic — fast and cheap.

Validate an IMO ship identification number check digit.

Validate an email address: RFC 5322 syntax, MX records, 5,361 disposable domain detection, role-based address detection (35 patterns), free provider detection, and typo suggestion for common providers (gmial.com ? gmail.com). Returns deliverability assess…

Validate and describe a five-field cron schedule for $0.001 USDC, including the next runs. 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.

Validate and standardize a postal address. Returns structured components, validity confidence, and suggested corrections. Works for 200+ countries via OpenStreetMap Nominatim.

Validate basic email syntax and split local/domain. Call when preflight before MX/DNS steps. Returns ok, local, domain 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.

Validate caller-supplied image delivery metadata before accepting an agent purchase. Checks HTTPS artifact URL, SHA-256 shape, supported MIME type, byte ceiling, and dimension ceilings without fetching or generating media. Returns explicit contract gaps and a normalized receipt for 0.001 USDC via x402 on Base; local-only and safe while generation refunds are pending.

Validate email shape (not mailbox existence). Call when you cheaply reject obvious non-emails before enrichment. Returns valid boolean for $0.001 USDC via x402 on Base. Shape only—not MX, SMTP, or ownership proof. No network, no keys, no retention. Results are advisory; the caller owns budgets, auth, and production controls.

Validate environment variable key shape A-Z0-9 underscore — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of Delx routes that already conve…

Validate even-length hex (optional 0x). Call when you preflight calldata/hash hex before chain tools. Returns valid 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.

Validate shape of common registry IDs (LEI/WMI/EIN-like). Call when preflight before registry lookups. Returns kind_guess and valid_shape 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.

Validates an IBAN: country prefix, length, segment-by-segment structure and the ISO 7064 MOD 97-10 check digits, recomputing the correct ones when they are wrong. Checked against the SWIFT IBAN Registry, which also yields bank and branch identifiers and names territories sharing a prefix (Jersey uses GB). Reports every check with status, not only failures, and states what it does not check: existence, bank name, national BBAN check digits. No outbound request.

Pocket Network (Shannon) validator security/decentralization feed: bonded validator count, total POKT bonded network-wide, and each validator's TOTAL bonded stake (self + delegations -- true voting power, not just self-stake) with commission rate and jailed status.

Top-N validators ranked by incentive for tracked Bittensor subnets. Filter only validator_permit=true neurons. AI agent API for validator-selection and stake-delegation decisions. Informational research data — not investment advice.

Company valuation estimate from public financials (revenue & earnings multiples), with range. Query: ?q= or ?siren=

VanEck Vietnam ETF (NYSE: VNM) — USD-denominated foreign investor exposure to the Vietnam market, delayed quote

Vary Header Normalize: Vary Header Normalize normalizes and deduplicates Vary header field names from bounded caller-supplied values without an external provider. Call Vary Header Normalize 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 Vary Header Normalize as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-onl…

Validate any EU VAT number against the official VIES registry and resolve the registered business name and address in one x402 call. Covers all 27 EU member states for VAT compliance, B2B invoice validation, and tax-ID verification in agentic finance workflows. Pay per check in USDC on Base, no API key, instant JSON.

EU VAT number validation (VIES) with predictable behavior for agents. Validates any EU VAT number against the European Commission's VIES service. Two modes: fast validation (may serve a cached result, labeled with its timestamp) and consultation-proof mode (always live, returns the official consultation number, requires requester identification). 'Not confirmed' does not imply the company is invalid. Machine-readable errors with per-member-state availability status.

Validate an EU VAT number and check whether a VAT registration is valid, against the official European Commission VIES registry in real time. Returns validity and, when available, the registered company name and address. Authoritative VAT number validation, verification and company lookup for invoicing, tax compliance and B2B onboarding across all EU member states.

Validate an EU VAT number's structure and per-country check digits. Format only — no VIES lookup, so it does not confirm the registration is active or belongs to the named trader.

VAT breakdown for an amount: net/tax/gross incl. statutory levy components

VAT breakdown for an amount: net/tax/gross incl. statutory levy components

VAT breakdown for an amount: net/tax/gross incl. statutory levy components

Validazione ufficiale in tempo reale di una Partita IVA europea tramite il registro VIES della Commissione Europea. Usa questo endpoint quando devi verificare se una Partita IVA UE è valida prima di emettere una fattura, registrare un cliente B2B o processare un ordine intracomunitario. Ritorna validità, ragione sociale e indirizzo registrato.

VAT / GST for 16 major economies (UK, EU, Australia, Canada, Japan, Singapore, UAE, India, and more) at the verified 2026 standard rate — add or remove.

VAULT POSITION (on-chain read): current redeemable value of a wallet's ERC-4626 vault position. Pass the pool_uid (from barker_executable_pools / barker_execution_quote) and the wallet address; Barker resolves the vault contract and reads balanceOf + convertToAssets directly on-chain, returning shares and current_value in the vault's underlying asset (value_asset, e.g. USDC).…

Dominant narrative on one crypto asset and whether it rotated in the last 24h (?asset=BTC) — narrative-change detection for trading agents. Descriptive research, not financial advice.

Cheapest entry point: the latest cached analyst signal for one asset — sentiment %, stance, divergence flag, narrative — with an age timestamp (?asset=BTC). Cached-only, no freshness guarantee: for a guaranteed-fresh read use /v1/consensus. Descriptive research, not financial advice.

Market-wide crypto regime read in one call: overall sentiment score, regime id, macro anchor and the top narrative driving the whole market right now. Live analyst read, not a cached aggregate. Descriptive research, not financial advice.

Sentiment-vs-price divergence read on a US STOCK ticker (?asset=NVDA): social sentiment %, dominant narrative, prediction-market context and any divergence from price action — a live analyst verdict on equities, not raw filings data. Descriptive research, not financial advice.

Anything happening on this asset right now? Live probe for significant triggers — price gap, news shock, social spike — with a 1-10 significance score, or a clean no-event answer (?asset=BTC). Built for agent polling loops that only want to act when something moves. Descriptive research, not financial advice.

Live prediction-market odds for one crypto asset — nearest liquid market, % odds, venue — plus whether the odds agree with current social sentiment (?asset=BTC). Descriptive research, not financial advice.

Social sentiment read for one crypto asset: bullish %, social score, and volume trend vs baseline — crowd positioning in one call (?asset=BTC). Fresh from the desk, priced under every comparable sentiment endpoint. Descriptive research, not financial advice.