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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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Crypto & DeFi
1,023 results- Rrobinhoodradar.comCrypto & DeFi
Robinhood Radar live reranked board: creator ratings and token ATH/price table.
Baserobinhoodradar.comfrom $0.018 endpoints - Rrobinhood-radar-nu4yz7wqv-lightfarm.vercel.appCrypto & DeFi
Robinhood Radar on-chain new-pool feed (every new Robinhood-chain launch).
Baserobinhood-radar-nu4yz7wqv-lightfarm.vercel.appfrom $0.0051 endpoint - Rrobinhood-radar-dsk86hfkw-lightfarm.vercel.appCrypto & DeFi
Robinhood Radar live reranked board: creator ratings and token ATH/price table.
Baserobinhood-radar-dsk86hfkw-lightfarm.vercel.appfrom $0.011 endpoint - DDevX Repo Run CheckCrypto & DeFi
Before an AI coding agent (or you) runs a GitHub repo's install steps: scans README, package.json install scripts, install.sh/setup.py, .vscode/tasks.json and Makefile for download-and-execute one-liners (iwr|iex, curl|sh), obfuscated or base64 payloads, known malware domains, typosquatted crypto dependencies, agent-targeted prompt injection and password-protected archives, plus GitHub signals of
Baserepo-run-check.nextill-pos.workers.devfrom $0.0051 endpoint - DDNS lookupCrypto & DeFi
prompt-injection risk scan: detects instruction override, tool abuse and secret exfiltration phrases before an agent consumes untrusted text.
Baserelay402.georgespring.workers.devfrom $0.00130 endpoints - Rregistry.frames.agCrypto & DeFi
Get token prices in any fiat/crypto currency
Baseregistry.frames.agfrom $0.0021 endpoint - Vverified-receiptCrypto & DeFi
Verified receipt for a crypto invoice: on-chain payment proof + permanent link.
Basereceipt.node01.orgfrom $0.101 endpoint - DDecision ReadinessCrypto & DeFi
capability_id=decision_readiness.event_confirmation.v1; determines whether authoritative evidence is sufficient to confirm a supported event before an autonomous agent continues. Current scope: Compound Governor proposal execution confirmation. Payment alternatives: Base mainnet or Solana mainnet native USDC; select one for one assessment. testnet_only=false; mainnet_supported=true.
Basereality-assurance.up.railway.appfrom $0.111 endpoint - RattlerAICrypto & DeFi
Autonomous smart contract security auditor — 20+ vulnerability classes, PoC exploits
Baserattler.lonestaroracle.xyzfrom $2.001 endpoint - Rrag-dietCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat (https://rag-diet.agentdiet.dev/v1/distill)
Baserag-diet.agentdiet.devfrom Free1 endpoint - QtyCrypto & DeFi
Canonical audit JSON plus sha256 of a previous Qty result. Includes input, definition ids, formulas, and a timestamp. The hash ignores the timestamp so the same payload always hashes the same. No chain write. Exact USDC $0.001 on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.
BaseSolanaqty.vercel.appfrom $0.0011 endpoint - Pprompt-guardCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseprompt-guard.agentdiet.devfrom Free5 endpoints - Pprompt-guardCrypto & DeFi
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.
Baseprompt-guard-72343955726.us-central1.run.appfrom Free5 endpoints - Ppricing-state-api.replit.appCrypto & DeFi
$0.01 USDC required (x402 / Base) Returns the history of detected pricing changes: what changed, plan-level detail, and when each change was detected. No API key needed. Pay with any x402-compatible wallet that holds USDC on Base. If your agent does not yet have a funded wallet, set one up via Coinbase Agentic Wallet or Base MCP — then standard x402 clients will pay and retry automatically.
BaseSolanapricing-state-api.replit.appfrom $0.0172 endpoints - MMachine Preflight APICrypto & DeFi
Simulate and inspect an unsigned Base transaction for approvals, privileged selectors, reverts and target-code anomalies.
Basepreflight.natio.refrom $0.021 endpoint
Linkrra Inference CreditsCrypto & DeFiLinkrra inference credits — pay-as-you-go top-up ($1-$1000) at $0.2273/M tokens
Basepool.linkrra.comfrom $0.0018 endpoints- Ppolymarket-oddsCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Basepolymarket-odds.agentdiet.devfrom Free5 endpoints - Ppolymarket-oddsCrypto & DeFi
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.
Basepolymarket-odds-72343955726.us-central1.run.appfrom Free5 endpoints - WalletPnLCrypto & DeFi
Wallet realized and unrealized PnL — per-token profit and loss and cost basis for any EVM address
Basepnl.lonestaroracle.xyzfrom $0.201 endpoint - Ppm-rules-x402.linholiday.workers.devCrypto & DeFi
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.
Basepm-rules-x402.linholiday.workers.devfrom $0.011 endpoint - PPenger VerifyOracleCrypto & DeFi
Live cryptocurrency spot price in USD from Coinbase primary spot API (e.g. ?symbol=BTC-USD, ETH-USD, SOL-USD).
Basepenger-oracle.run402.comfrom Free6 endpoints - Ppayment-verifier.relayhop.workers.devCrypto & DeFi
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.
Basepayment-verifier.relayhop.workers.devfrom $0.0051 endpoint
PayGuardCrypto & DeFiSanctions 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.
Basepayguard.agentgate.workers.devfrom $0.0011 endpoint- Bbtc-txCrypto & DeFi
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.
BaseSolanapayai.agentstools.devfrom $0.001362 endpoints - CCrypto Price ConsensusCrypto & DeFi
Return a USD spot-price consensus for BTC, ETH, SOL, or USDC using fixed public CoinGecko, Coinbase, and Kraken routes.
Basepatch-guard-api.me-e51.workers.devfrom $0.0011 endpoint
OwlChartCrypto & DeFiWhere leveraged liquidity sits above and below the price of a coin, the strongest liquidation magnets with size and distance, and which way the price is being pulled. Use it to judge the likely next move of BTC, ETH or any major coin.
Baseowlchart.comfrom $0.031 endpoint- Oorigin-mcp.fly.devCrypto & DeFi
Get holder count and top holders for a token with concentration metrics (HHI)
Baseorigin-mcp.fly.devfrom $0.00113 endpoints - Oorbit Econ DataCrypto & DeFi
Currency conversion (ECB), $0.001 USDC per call: Convert an amount between currencies at the latest (or a historical date's) European Central Bank reference rate: amount, from, one or more targets → converted amounts, rate used, inverse rate and rate date. ~30 fiat currencies; no crypto. No params = runs the example input.
SolanaBaseorbit-econ.orbit-builder.workers.devfrom $0.0015 endpoints - OONE EngineCrypto & DeFi
Generate a SHA-512 cryptographic hash from UTF-8 text
Baseone-search.one-engine.workers.devfrom $0.000912 endpoints - Oonchain.scrapemole.workers.devCrypto & DeFi
Use when you need a trustworthy USD price for crypto assets (ETH, BTC, cbBTC, SOL, LINK, AAVE, stablecoins), fiat FX rates (EUR, GBP, JPY…) or metals (XAU, XAG): reads the Chainlink price feed contracts directly from Base or Ethereum in one multicall and returns price, last update time, age in seconds, a stale flag and the feed address so the value is verifiable on-chain. Up to 10 symbols per call
Baseonchain.scrapemole.workers.devfrom $0.0018 endpoints
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.