x402 Services
| Rank | Service | Category | Chains | Volume · 30d | Transactions · 30d | Buyers |
|---|---|---|---|---|---|---|
| — | AgentPredict x402 API predict.memoryapi.org Prediction markets API - browse and track Polymarket and Manifold markets. All endpoints support x402 HTTP 402 payment protocol. | Data | Base | $0.00 | 0 | 0 |
| — | PreFlight Temporary File Relay relay.preflightstack.com Create a temporary public HTTPS download URL for an artifact generated by an agent or tool when the sending and receiving systems do not share storage. The… | AI | Base | $0.00 | 0 | 0 |
| — | PreIPO Feed by Aaron Zhang preipo-feed.vercel.app Fundamentals of private AI companies (revenue, costs, compute, cash, users, funding) as JSON, priced per call over x402. Every figure carries its own source… | AI | Base | $0.43 | 33 | 4 |
| — | UK Premises Licence Preflight HTTP API premises.regevidencehub.com HTTP compatibility surface for the same deterministic, evidence-linked premises-licence decision engine exposed over MCP. Free readiness/status routes remain… | Other | Base | $0.00 | 0 | 0 |
| — | PremiumPin premiumpin.com Source-level US property records through one combinable closed catalog. Read-only. Agents use API keys (Bearer) or hosted MCP OAuth. The website handles… | Data | Base | $0.02 | 1 | 2 |
| — | Book chapter preppers-paradise.com 98 practical DIY/electronics/programming/AI books. Free catalog + teaser chapters. Full manuscripts via x402 USDC on Base (Coinbase CDP). No accounts, no API… | AI | Base | $0.00 | 0 | 0 |
| — | presign-guard presign-guard.fizzl.eu Pre-sign risk check for AI agents: a green/orange/red verdict with reason codes before signing an EVM transaction, approval or EIP-712 signature. Checks the… | AI | Base, Solana | $0.00 | 0 | 0 |
| — | presign-guard presign-guard.onrender.com Pre-sign risk check for AI agents: a green/orange/red verdict with reason codes before signing an EVM transaction, approval or EIP-712 signature. Checks the… | AI | Base, Solana | $0.00 | 0 | 0 |
| — | SYNTHORA pre-sign transaction safety verdict presign.hergertsynthora.com Pre-sign security verdict for autonomous agents: before an agent SIGNS and settles a transaction, get an allow/warn/block verdict with reasons. Decodes the… | AI | Base | $0.00 | 0 | 0 |
| — | AmanChain x402 Agent API preview-chat-c6089071-758a-449d-b4a7-6fa19ebc955c.space-z.ai Quantum-resistant (ML-DSA-87 + Ed25519) proof-of-work blockchain with an AI agent marketplace: 59 node-operated paid services, callable by any AI agent over… | AI | Base | $0.00 | 0 | 0 |
| — | Pricing State API pricing-state-api.replit.app Machine-readable pricing for the SaaS and cloud vendors your agent needs to reason about — normalised, verified, and diffed over time. | AI | Base | $0.00 | 0 | 0 |
| — | Print Prototype Engineer prototype.api.williamrobinson.dev Apply deterministic parameter edits to a self-contained OpenSCAD model, verify preserve constraints against the baseline, slice it with PrusaSlicer, and… | AI | Base | $0.00 | 0 | 0 |
| — | Probability Distributions distribution.openverbs.com Probability distributions — normal, Student's t, binomial and Poisson — each with density/mass, cumulative distribution and quantile (inverse-CDF) functions. | Utility | Base | $0.00 | 0 | 0 |
| — | Problocks problocks.io Per-request USDC payments for API access. The connectivity endpoint returns pong and a UTC timestamp after settlement. | Utility | Base | $0.008 | 8 | 6 |
| — | Product-Label Artwork Compiler label.api.williamrobinson.dev Compile a structured product-label spec (dimensions, EU FIC or US FDA ruleset, ingredients/allergens, nutrition, GS1 barcode, brand style) into a… | Utility | Base | $0.00 | 0 | 0 |
| — | Project Foundry Stage Zero project-foundry-stage-zero.replit.app A small machine-commerce experimentation API. Discover services with GET /api/services, then execute one with POST /api/execute/{serviceid}. The echo service… | Other | Base | $0.00 | 0 | 0 |
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