the402 x402 endpoint directory

Current price, 24h change, and market cap for coins by id (CoinGecko free API).

Turn a place name into latitude/longitude, country, and population (Open-Meteo geocoding).

Current US/European AQI and PM2.5/PM10/ozone for any lat/lon (Open-Meteo air-quality).

Current temperature, wind, humidity, and conditions for any lat/lon (Open-Meteo, keyless).

Check whether a password has appeared in known data breaches, using k-anonymity: the password is hashed locally and on

Current US weather conditions (temp in C+F, humidity, wind, pressure, description) from the NWS for coordinates OR a U

Structured parse of a public web page: main text, headings, links, tables and rich metadata (description, canonical, l

Keyword news search across web news engines (Bing/DuckDuckGo/Yahoo via ddgs). Returns dated headlines with title/url/s

Cheap structural IBAN validation: ISO 13616 checksum + per-country structure/length. Returns valid plus, on rejection,

Resolve a Farcaster identity to its verified on-chain wallets. Give one of fid or username and get every cryptographic

US capital gains tax estimate: long-term 0/15/20 percent rates or short-term ordinary rates, plus the net investment i

US payroll tax estimate: Social Security and Medicare on wages, or self-employment tax, including the additional Medic

Verify an npm/PyPI package before installing it: existence, known CVEs (OSV.dev), OpenSSF Scorecard, and typosquat/slo

Deep dive on one crypto macro indicator: definition, formula, exact status thresholds, current value, recent stats and

Measure per-field presence across bounded JSON records. Use it as a bounded preflight or analysis step inside an enter

Post a task with a USDC budget and let live x402 services compete for it. Publish a capability family, bounded input/o

PDF text extraction API for agents: extract bounded UTF-8 text from one caller-supplied PDF for $0.003 USDC via x402.

Central government debt balance by category (JGBs total, of which General Bonds; FILP bonds; Borrowings; Financing Bil

1h/24h realized volatility (stdev of consecutive 1-minute log returns) computed from our own on-chain mid observations

Wrapped-BTC parity monitor on Base: WBTC/cbBTC on-chain pool price vs 1:1 parity, in bps, plus consecutive-minute stre

Stablecoin peg-deviation summary on Base (USDT/USDC, USDC/USDbC): current deviation in bps from the 1.0 peg per on-cha

Evaluate an untrusted path for unsafe parent-segment signals without returning secret data. Use it as a bounded prefli

Combine success rate, latency score, and saturation into an ops health band — call when combining success, latency sco

Count SLA breaches in a latency sample against a millisecond threshold — call when counting latency samples above an S

Compute capacity saturation from in-flight work and capacity — call when measuring in-flight work against capacity. Us

Estimate queue wait from depth, mean service time, and workers — call when estimating wait from depth, service time, a

Compute cost per successful delivery from total cost and success count — call when dividing total cost by successful d

Estimate p95 latency from a bounded numeric sample — call when estimating p95 from a bounded numeric sample. Use for S

Compute success and failure rates from success and total counts — call when computing success and failure rates from c

Convert an SLO percentage and request window into allowed failure budget — call when converting SLO% and request windo

Compare observed latency against an SLA threshold in milliseconds — call when comparing observed latency to an SLA thr

Split a model token budget into system, output reserve, and available input — call when reserving system and output to

List top-level keys from JSON-LD or JSON objects the caller already holds — call when listing keys from JSON-LD the ca

Harvest URL and DOI citation patterns from text without network access — call when harvesting URL/DOI citation pattern

Detect dominant Unicode script families in a text sample — call when detecting dominant Unicode script families. Use o

Measure keyword density inside caller-supplied text — call when measuring keyword density in held text. Use on text/UR

Plan overlapping character chunks for RAG without storing the text — call when planning overlapping character chunks f

Index markdown ATX headings from caller-supplied text only — call when indexing ATX headings in caller-supplied markdo

Guess a MIME type from a filename, path, or URL extension — call when guessing MIME type from an extension. Use on tex

Parse query pairs and redact credential-like keys without fetching — call when parsing query pairs and redacting secre

Normalize URL scheme, host casing, and path slashes without fetching — call when normalizing scheme, host, and path wi

Canonicalize a ticker symbol and split common base/quote separators — call when cleaning ticker symbols and splitting

Align ISO-8601 timestamps down to fixed UTC interval buckets — call when bucket-aligning ISO timestamps to a UTC inter

Normalize non-negative weights so they sum to one when possible — call when normalizing non-negative ensemble weights

Clip a score into an inclusive numeric range — call when clipping a score into an inclusive range. Use on caller-suppl

Classify a signal against optional upper and lower thresholds — call when classifying a signal against upper/lower thr

Estimate descriptive sample volatility from caller-supplied returns — call when estimating descriptive sample volatili

Compute percent return between start and end values — call when computing percent return between two values. Use on ca

Compute mid price and bid-ask spread in basis points — call when computing mid and bid-ask spread in basis points. Use

Aggregate a bounded price list into open, high, low, and close — call when collapsing a price list into open/high/low/