x402 Services
| Rank | Service | Category | Chains | Volume · 30d | Transactions · 30d | Buyers |
|---|---|---|---|---|---|---|
| — | kassa-402.annushka1190.workers.dev kassa-402.annushka1190.workers.dev A data service with no documented endpoints. | Data | Solana | $0.00 | 0 | 0 |
| — | Keenable api.keenable.ai Web search and page fetching API. | AI | Base | $0.08 | 8 | 6 |
| — | Keenable api-test.keenable.ai Web search and page fetching API. | AI | $0.00 | 0 | 0 | |
| — | Keyless keyless.run Paid APIs with no signup. USDC on Base via x402. | AI | Base | $0.00 | 0 | 0 |
| — | Keyless keyless-theta.vercel.app Paid APIs with no signup. USDC on Base via x402. | AI | Base | $0.086 | 7 | 3 |
| — | keyword-research keyword-research.api.klymax402.com SEO keyword research -- Google Suggest, intent classification, long-tail discovery, related queries. Content planning. | Data | $0.00 | 0 | 0 | |
| — | ZWING KG kg.dyor.network Crypto-native knowledge graph with 586K+ entities, 50 AI-generated signal types, and cross-domain convergence detection. Pay per request via x402 (USDC on… | Search | Base | $0.00 | 0 | 0 |
| — | khipu-x402.khipu-agency.workers.dev khipu-x402.khipu-agency.workers.dev Provides paid HTTP API access to security-header information. | Utility | Base | $0.00 | 0 | 0 |
| — | KHOTEM khotem.com Cryptographic Witness API | AI | Base, Solana | $0.00 | 0 | 0 |
| — | HALOWERK klimawerk klima.halowerk.com HALOWERK klimawerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet. | Data | Base | $0.00 | 0 | 0 |
| — | Klima Retirement Aggregator x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app Retire tokenized carbon credits on Base through Klima Protocol and the Carbonmark marketplace, and resolve the public Carbonmark certificate. Discovery… | Data | Base | $0.055 | 55 | 10 |
| — | klminnovation.com klminnovation.com Provides a paid KLM Playbook+ Agent/MCP pack. | AI | Base | $0.00 | 0 | 1 |
| — | know.fast know.fast Send a link. Know it. Any URL — article, YouTube video, X post, podcast episode, paper, PDF, GitHub repo — becomes a durable, cited knowledge page plus a… | AI | Base | $0.00 | 0 | 0 |
| — | knowledge-graph-synthesis-api knowledge-graph-synthesis-api.johntaylor1online.workers.dev Calculates knowledge graph synthesis results from an input. | Other | $0.00 | 0 | 0 | |
| — | Korp TxCert korp-txcert-sepolia.mute-cell-557f.workers.dev Check an unsigned EVM transaction before an AI agent signs it. Enforces spending limits, recipient restrictions, ERC20 approval rules, unlimited approval… | AI | $0.00 | 0 | 0 | |
| — | Kortex Service Trust kortex.rohnelt.dev Kortex tells an agent which x402 service actually works, from evidence: uptime measured over time, a valid 402, and settlements proven on-chain. | AI | Base | $0.00 | 0 | 0 |
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