the402 x402 endpoint directory

Fetch a public URL and return clean markdown/text + metadata (trafilatura).

Reference tables for a US tax year and filing status: income brackets, standard deduction, FICA constants, and capital

Search foods by name in USDA FoodData Central (public domain). Returns ranked matches with fdc_id, description, brand,

Text-to-speech API and voice generator for AI agents: create short narration, voiceover, voice-agent prompts, IVR and

Validate JSON against a JSON Schema. Checks LLM and agent output and API request payloads, returning structured errors

Prove a piece of data existed at a point in time. POST {data} returns its sha256, a recorded timestamp, and an HMAC re

Lightweight type/required/property check for agent-held JSON (not full draft validation) — first-party local utility f

Extract title and common meta tags from caller-held HTML — first-party local utility for agent preflight and proven mi

Extract href links from caller-held HTML without network access — first-party local utility for agent preflight and pr

Same substring name search as sanctions.entity_view, pre-filtered to the Russia/Ukraine(Crimea)-related subset of Japa

Cabinet Office Composite Index (CI), one of leading/coincident/lagging, 2020=100, monthly since 1980. Same e-Stat API

Japan's unemployment rate from the Statistics Bureau's Labour Force Survey, not seasonally adjusted, monthly since 200

Tankan (Bank of Japan's quarterly Short-Term Economic Survey of Enterprises) business-conditions diffusion index for l

Individual yen foreign-exchange intervention operations (date, amount, currency pair) from the Ministry of Finance's o

Japanese government bond yield curve (1 to 40 years, 15 tenors) from the Ministry of Finance's daily reference series.

Same detection framework as dex.peg.anomalies, re-shaped to a single yes/no for right now: is the latest available 1-m

Fuzzy name match against the UK Sanctions List (OFSI): individuals and entities under UK financial sanctions regimes.

Weekly official Japan Customs reference exchange rate (税関長公示レート) used to convert import declaration values to yen unde

1-minute cross-venue spread statistics (bps) for AERO/USDC on Base: Aerodrome's own vAMM pool vs its Uniswap v3 0.3% p

Historical and current Japanese interest-rate series from the Bank of Japan's official Time-Series Data Search Site: t

National-level public-safety situation snapshot, quoted verbatim from Japan's National Police Agency (NPA) official an

1-minute cross-venue spread statistics (bps) for cbBTC/USDC on Base: Uniswap v3 0.05% vs Aerodrome Slipstream 0.05% (o

Base network gas fee statistics (1-minute baseFeePerGas buckets): p25/p50/p90/p99 and the current value's percentile r

Single-address screening against OFAC SDN List digital currency addresses. Source: U.S. Department of the Treasury (pu

Decoded Base transaction receipt: success status, confirmations, and decoded USDC Transfer events. Useful for automate

Time-weighted average price (1h/24h) per venue pair, computed from our own 1-minute observation buckets. Includes cove

Screen a crypto address (EVM/BTC/TRON etc.) against Japan MOF asset-freeze sanctions designations (外為法・資産凍結措置). Return

Domain availability and expiry intelligence via RDAP, the WHOIS successor. Queries the authoritative registry for any

Derive a deterministic namespaced idempotency key from canonical JSON. Use it before an autonomous workflow acts on un

Normalize heterogeneous webhook events and derive a stable payload fingerprint. Use it before an autonomous workflow a

Audit cache headers for missing policy and sensitive public-cache exposure. Use it before an autonomous workflow acts

Audit a Content-Security-Policy for missing defaults and unsafe script directives. Use it before an autonomous workflo

Audit CORS response headers for wildcard, credential, and cache-variance risks. Use it before an autonomous workflow a

Summarize log severity and hashed error fingerprints without returning sensitive error lines. Use it before an autonom

Normalize JSON or common text logs into one stable event envelope. Use it before an autonomous workflow acts on untrus

Normalize and chronologically order incident events into a machine-readable timeline. Use it before an autonomous work

Calculate p50, p95, p99, mean, min, and max from bounded latency samples. Use it before an autonomous workflow acts on

Measure achieved reliability against an SLO target from good and total events. Use it before an autonomous workflow ac

Calculate remaining failure budget and burn from traffic, failures, and an SLO target. Use it before an autonomous wor

Calculate a bounded exponential backoff schedule for reliable autonomous retries. Use it before an autonomous workflow

Decide whether an HTTP failure is safe to retry and return an idempotency-aware policy. Use it before an autonomous wo

Turn an OpenAPI document into a compact operation index for planning and tool selection. Use it before an autonomous w

Detect removed OpenAPI paths and methods before an agent deploys a client-breaking change. Use it before an autonomous

Check a JSON payload against a bounded structural contract and return path-level errors. Use it before an autonomous w

Redact common PII candidates before logs, prompts, or downstream tools receive the text. Use it before an autonomous w

Count likely personal-data classes without echoing detected values. Use it before an autonomous workflow acts on untru

Detect likely credentials and private keys without returning their values. Use it before an autonomous workflow acts o

Screen untrusted text for prompt-injection and tool-coercion signals before an agent consumes it. Use it before an aut

Is this address a contract, and what code does it hold? Returns isContract, deployed bytecode size, and the keccak-256

Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. C