Services
The x402 service directory, ranked by verified on-chain volume. Add one to an agent as a skill and pay per call — no key, no account. To compare every seller of one job on a shared price, see Unified Services.
x402 call market
Listed price · per call216,120 priced of 218,120 matched · 3,944 providers
$0.010
Median
$0.0020$0.050
- $0.0050
- p25
- $0.010
- p75
- $0.0000
- low
- $1,000,000.00
- high
The box is the middle half of the market, $0.0050 to $0.010; the whiskers reach the 10th and 90th percentiles and the axis between them is logarithmic. Listed prices only — what a service asks, not what it was paid.
CategoryAll categories
218,120 services matched
| Activity | Agent | ||||||
|---|---|---|---|---|---|---|---|
Any | Any | Any | |||||
x402.ottoai.services 80 pay-per-call AI services on x402 V2 — market intel, DeFi execution, AI creative tools. USDC on Base or Solana. Permit2-ready, SIWX on select endpoints. From $0.001 per call. | $0.0010 | — | 144 | 45 | Live | ||
api.kadec0.xyz Smart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as a coherent field cluster; a natural-language question runs hybrid retrieval over… | $0.020 | — | 143 | 3 | Live | ||
api.onesource.io Two data families for AI agents: live Ethereum mainnet, Sepolia testnet, and Robinhood Chain RPC reads, plus Deepstate on-chain market data — order books, trades, candles, and analytics. Pay per call… | $0.020 | — | 143 | 143 | Live | ||
orbisapi.com Calculate cloud data egress costs from transfer volumes | $0.0050 | — | 143 | 22 | Offline | ||
| $0.0050 | — | 143 | 19 | Offline | |||
| $0.0050 | — | 143 | 17 | Offline | |||
| $0.0025 | — | 142 | 7 | Live | |||
agenttoll.dev 109+ receipt-backed x402 work products for AI agents. Clear prices, spend caps, buyer metadata, and structured results over Base USDC. | $0.030 | — | 142 | 2 | Live | ||
api.bitrefill.com Search 10,000+ gift card & voucher brands across 180+ countries by name and country. Pay in USDC via x402, no account. | $0.0020 | — | 142 | 40 | Live | ||
api.onesource.io Ethereum mainnet and Sepolia testnet RPC for AI agents, served from OneSource-operated nodes. Live block, balance, contract, NFT, transaction, and event data. Pay per call or use batch/session mode —… | $0.0040 | — | 142 | 142 | Live | ||
orbisapi.com Validate data storage locations meet residency requirements | $0.0050 | — | 142 | 19 | Offline | ||
| $0.0050 | — | 142 | 22 | Offline | |||
tick.hugen.tokyo List all available FX symbols with their current quality state and source count. AI agent API for discovering available instruments before subscribing to tick data. Accepts USDC payments on Base and S… | $0.0050 | — | 142 | 123 | Live | ||
| $0.0050 | — | 141 | 21 | Offline | |||
| $0.0050 | — | 141 | 18 | Offline | |||
| $0.0050 | — | 141 | 20 | Offline | |||
| $0.0050 | — | 141 | 17 | Offline | |||
| $0.0050 | — | 141 | 21 | Offline | |||
orbisapi.com Calculate teleconsult wait time metrics and capacity needs | $0.0050 | — | 141 | 21 | Offline | ||
orbisapi.com Score AI output compliance with constitutional principles | $0.0050 | — | 140 | 19 | Offline | ||
orbisapi.com Calculate paint needed from room dimensions and coat count | $0.0050 | — | 140 | 15 | Offline | ||
orbisapi.com Calculate sustainable bond pricing premium from ESG factors | $0.0050 | — | 140 | 18 | Offline | ||
orbisapi.com Map web forms into agent-fillable fields, validation rules, risk flags, and submission readiness | $0.0050 | — | 140 | 22 | Offline | ||
www.cultos.dev Open-source infrastructure for the agent economy. Hire developer services over x402 or build with the Cult OS stack and Virtuals ACP. | $0.0010 | — | 140 | 40 | Live | ||
www.surplusintelligence.ai Buy the cheapest inference. Sell your credits. The open order book for AI models. Up to 90% off GPT-5.5, Claude Opus 4.8, and more. | $0.0033 | — | 140 | 1 | Live |
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will find and price a paid API you can call over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
Verified volume and provider trust are Roundhouse-only signals; activity is settlements to the service's payee wallet over 30 days, 5-day smoothed. 218,120 catalog entries indexed.
Show the promptHide the prompt
Using Roundhouse, find x402 endpoints that can do what I need, tell me what each call costs, and whether the endpoint answered when last probed. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=<what-you-need>' Then check the merchant's real payment record before paying: curl -s 'https://api.roundhouseai.io/v0/merchants/<payTo-wallet>' Always read the price from the live 402, never from a cached figure. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.