Explore APIs

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Linkrra Voice — text-to-speech with WAV output and automatic Hebrew nikud. Pay per call in USDC on any network offered in the payment challenge; no account or API key. From $0.01 per call.

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AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat

Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (/v1/x402-broker) — Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall.

Structured Polymarket resolution rules for one market: full rules_text, key clauses, end time in UTC and America/New_York, resolution source, UMA/Chainlink oracle hints, umaBond, outcomes, status. Title ≠ rules. No CLOB book or live odds.

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Use when you need the public npm registry card for a package (scoped or unscoped): returns description, homepage, bugs URL, repository, license, keywords, maintainers as names only (emails stripped), number of versions, latest dist-tag version, created/modified times, and last-week download count from the official downloads API. Private packages are not supported.

PipRail live x402 demo: pay $0.01 USDC on Base to unlock.

Builds a gas-optimized multi-recipient payout plan: either a list of native transfers or a single Multicall3 aggregate3 batch of ERC20 transfer() calls. Returns calldata only - this service never signs or broadcasts.

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[PerCall] COMPUTED — not raw data. Cross-pair momentum score (-100 to +100) with regime label for the top 10 USDT pairs, computed from 7 days of hourly closes. Includes 24h/7d rate-of-change, realised volatility, and a composite ranking. Designed for pre-trade agent checks.

Decode a NIP-19 Nostr identifier (npub/note/nprofile/nevent/naddr) to hex, relays, author, kind. GET ?s=<bech32>

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Repairs malformed LLM JSON: strips Markdown fences and prose wrappers, fixes trailing commas, converts Python literals (True/False/None) and single/unquoted keys, removes comments, recovers balanced JSON from truncated output. Body {input} -> {ok, repaired, applied}.

Live cryptocurrency spot price in USD from Coinbase primary spot API (e.g. ?symbol=BTC-USD, ETH-USD, SOL-USD).

Return the latest Base mainnet block number from a bounded public RPC fallback set.

Real-time on-chain payment verification and check via Base RPC. Returns structured signals: verified status, amount, sender, recipient, transaction confirmation, block number. Pay $0.005 USDC per check. Covers payment, transaction, address, contract, score, signals.

Sanctions screen for one crypto address, for agents and apps that send payments: exact match against all 1050 digital currency addresses in the official US Treasury OFAC SDN list (EVM case-insensitive). Returns sanctioned true/false, matching SDN entity, programs and list date, a chain guess and checksum validity, plus the list date. Informational, not legal advice.

Crypto tickers from Bybit (spot): price, change and volume by pair - POST only (Крипто-тикеры Bybit (spot): цена, изменение и объём по паре - только POST)

Recommended Bitcoin transaction fee-rates in sat per vByte across five confirmation horizons (fastest, half hour, hour, economy, minimum) plus a live mempool congestion snapshot with an estimated block backlog. Informational, not advice.

Basic data feed - 1 request

Pay-per-call cited research brief. The request carries a query and 1 to 12 quotes with source URLs; the response is a short brief that cites only those quotes, at 0.008 USDC per call on Base. Payment settles after the brief is produced. A client nonce header makes a retry free of a second charge.

Use when an agent must decide whether an address or x402 service has actually received USDC from anyone other than its operator - before paying it, listing it, or trusting a claim about it. Returns third-party total, distinct senders, first/last seen, block height. Scope: Base + USDC.

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green alien

Return a USD spot-price consensus for BTC, ETH, SOL, or USDC using fixed public CoinGecko, Coinbase, and Kraken routes.

Shopify and Google Merchant Center / Google Shopping product-feed audit for 1-100 catalog records. Detect feed errors, duplicate IDs, invalid GTIN/UPC/EAN checksums, malformed URLs and prices, availability issues, and brand/MPN identifier inconsistencies before feed submission.

Audit one x402 seller origin and paid route using public Circle runtime-readiness plus Agent402 routing/settlement evidence. Returns machine_buyable, contract_ready, or repair_required with exact next actions. No target payment is sent.

Fetch a public web page and return its title, description, clean Markdown (scripts, styles, nav chrome removed) and the list of links. No model call, deterministic.