Every agent-payable API.

Hash text: keccak-256 (Ethereum) and SHA-256, plus byte length. POST JSON {"text": "…"} up to 20,000 characters. Pure computation, nothing stored, no cache.

Hash text: keccak-256 (Ethereum) and SHA-256, plus byte length. POST JSON {"text": "…"} up to 20,000 characters. Pure computation, nothing stored, no cache.

Compute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url.

SHA-256 of the secret concatenated with ?salt=

Hash text (?algo=sha256|sha512|sha1|md5&text=)

Global (or per-country) natural-hazard / disaster alert signal (optional ?country=)

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

Header semantics audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Header semantics decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Header semantics repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Website security-headers audit with A-F grade, cookie flags and version leaks — Genesis402 / UnyKorn Operator Network

Call when an agent needs an h1–h6 outline from a public URL or provided HTML. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/heading-outline first.

Heading outline audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Heading outline decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Heading outline repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Healing throughput calculator: Calculate healing per second with cast time and efficiency.

Is this tokenized stock safe to buy? Tokenized-equity / RWA check before an agent buys an on-chain US stock. ?symbol=AAPLx or ?address= returns ok/review/avoid + AUTHENTICITY - the REAL issuer token or an IMPERSONATOR? Verified via Backed/xStocks' registry and Ondo's on-chain mint authority. Plus depeg_bps, liquidity, trading_halted, freeze_authority. ?underlying=TSLA compares every verified version across issuers. ?watch=addr1,addr2 returns only what CHANGED.

Is the Govparse Agent Gateway up, and which product datasets does it front? Returns a signed _meta attestation proving the payment-to-attestation pipeline end to end.

Health and payment-path check. Returns server time and a confirmation that your x402 payment settled. Cheapest endpoint in the catalog; use it to verify your client's payment flow before calling paid tools.

Performs comprehensive URL health checks, measuring response time, status code, security headers, and TLS/SSL certificate validity. Route: GET /paid/health-check?url=https://example.com. Ideal for automated monitoring and endpoint auditing.

Health check endpoint for x402 payment flow testing

Hedera (HBAR) price in USD now, with 24h and 7d change — Genesis402 / UnyKorn Operator Network

Hedera Live ticker: Return the last trade, bid, ask, and rolling volume. Coinbase Exchange public USD market data; not investment advice.

Helium 24-hour statistics: 24-hour statistics for Helium (HNT-USD) from Coinbase Exchange public USD market data. The product ID can be overridden; data only, not investment advice.

Helium Bid-ask spread check: Bid-ask spread check for Helium (HNT-USD) from Coinbase Exchange public USD market data. The product ID can be overridden; data only, not investment advice.

Hello from Taiwan — a signed timestamp from my first x402 stall

Searches French companies by name, SIREN, SIRET or optional location criteria and returns structured matching company records.

Deterministic JSON repair for agent tool outputs, with optional JSON Schema validation. Built for tight agent loops at micropayment prices.

Probe a peer x402 jobs URL and return a CC0 x402-probe-receipt-v1 (HTTP status, PAYMENT-REQUIRED body/header agreement, latency). Interop helper for agent operators. Does not settle. Keywords: x402, probe, 402, interop, b2b.

Fast deterministic check that a public URL is alive: HTTP status, redirects, content-type, size, and title. Built for agent workflows before paying for deeper crawls.

Converts between hex, decimal and UTF-8 text in one call, with big integers handled exactly. For reading raw RPC output, which comes back as hex and overflows a JavaScript number.

Hex encoding of UTF-8 text — Genesis402 / UnyKorn Operator Network

Hex-decode a hex string (optional 0x prefix) back to bytes, returned as UTF-8 (when printable) and base64. Rejects odd-length or non-hex input.

Hex-encode an input string (bytes to lowercase hex). Binary-safe representation for wire formats, hashes and calldata.

Measure verified dependency concentration and observed-but-undeclared common-mode dependencies.

High-quality LLM translation with control: target language, optional formality and tone, auto source detection. Preserves nuance and idiom.

Highest-demand x402 services tagged 'ai': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 194 providers and 541 paying wallets measured in this tag.

Highest-demand x402 services tagged 'ai-agents': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 248 providers and 433 paying wallets measured in this tag.

Highest-demand x402 services tagged 'analytics': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 128 providers and 396 paying wallets measured in this tag.

Highest-demand x402 services tagged 'base': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 305 providers and 687 paying wallets measured in this tag.

Highest-demand x402 services tagged 'bitcoin': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 86 providers and 249 paying wallets measured in this tag.

Highest-demand x402 services tagged 'compliance': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 184 providers and 278 paying wallets measured in this tag.

Highest-demand x402 services tagged 'country': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 760 providers and 765 paying wallets measured in this tag.

Highest-demand x402 services tagged 'data': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 299 providers and 573 paying wallets measured in this tag.

Highest-demand x402 services tagged 'defi': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 257 providers and 591 paying wallets measured in this tag.

Highest-demand x402 services tagged 'derivatives': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 52 providers and 202 paying wallets measured in this tag.

Highest-demand x402 services tagged 'entertainment': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 6 providers and 205 paying wallets measured in this tag.

Highest-demand x402 services tagged 'europe': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 924 providers and 930 paying wallets measured in this tag.

Highest-demand x402 services tagged 'evidence': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 743 providers and 765 paying wallets measured in this tag.