x402 Services
| Rank | Service | Category | Chains | Volume · 30d | Transactions · 30d | Buyers |
|---|---|---|---|---|---|---|
| — | SENTINEL sentinel-agent.dev Agent-Level Transaction Safety Oracle for Autonomous AI Agents — x402 micropayments | AI | Base | $0.00 | 0 | 0 |
| — | SENTINEL sentinel-agent-wru6.onrender.com Agent-Level Transaction Safety Oracle for Autonomous AI Agents — x402 micropayments | AI | Base | $0.00 | 0 | 0 |
| — | seo-analyzer seo-analyzer.api.klymax402.com Full on-page SEO audit for any URL. Score 0-100, meta tags, headings, schema markup, images, links, load time. Prioritized fixes. | Data | Base | $0.00 | 0 | 0 |
| — | SEO Data Extractor seo-data-extractor.underscoredone.com Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta description, meta… | Data | Base, Solana | $0.00 | 0 | 0 |
| — | HALOWERK SEO, Crawling & Indexierung seo.halowerk.com HALOWERK SEO, Crawling & Indexierung — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet. | Search | Base | $0.00 | 0 | 0 |
| — | serp402 serp402.com Google search for agents, paid per call over x402: USD 0.005 in USDC, no API key. Results are retrieved through Serper (serper.dev), which is not affiliated… | AI | Base, Solana | $0.00 | 0 | 0 |
| — | server.r1xlabs.com r1xlabs.com Provides access to an API hosted at server.r1xlabs.com. | Other | Base | $0.00 | 0 | 0 |
| — | Settled settled.justinedwardvolmer.workers.dev Did it pay? Live, verified, machine-readable liveness, quote, on-chain activity and quality data for x402 endpoints. Paid routes use x402 (HTTP 402 + USDC) or… | AI | Base | $1.24 | 29 | 8 |
| — | Settled settled.tools Did it pay? Settled checks x402 endpoints before agents spend: whether a seller's on-chain sales are real or self-generated, live probes, real paid test… | AI | Base | $0.00 | 0 | 0 |
| — | SFtunes tapes for agents sftunes.com Hand-made music curation from real people: public tapes and public Top 10 lists with per-track liner notes and canonical music-service links. Paid endpoints… | Data | Base | $0.08 | 8 | 7 |
| — | Sidera shadowharness.com Sidera agent guide: https://shadowharness.com/sidera/llm/ Start with the overview, then follow the sample, pricing and ordering sections. Turn supported… | AI | Base, Solana | $3.40 | 10 | 3 |
| — | Shared Hold API shared-hold-api.onrender.com SQLite-backed shared boundary storage for AI agents. POST /hold stores a UTF-8 payload (paid: 0.005 USDC). GET /hold/{id} retrieves by holdid (free). GET… | AI | Base | $0.00 | 0 | 0 |
| — | shelf.thirdmade.net shelf.thirdmade.net A data service providing paid probing, verification, lookup, generation, analysis, and security endpoints. | Data | Base | $0.00 | 0 | 0 |
| — | ShellPermit shellpermit.schemasure.com ShellPermit tokenizes a candidate bash command — quoting, escaping, pipelines, command and process substitution, heredocs, redirections — walks the result… | AI | Base | $0.00 | 0 | 0 |
| — | ShieldAPI vainplex.dev x402-native security intelligence API for AI agents. Use ShieldAPI as the paid security/trust preflight before an agent pays, connects to MCP, installs… | AI | Base | $0.026 | 13 | 9 |
| — | ShieldForm shieldform.waltsoft.net Invisible bot protection. Score form submissions 0-100 based on behavioral signals. No CAPTCHAs. | Data | Base, Solana | $0.00 | 0 | 0 |
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