x402 AI API
x402 AI APIs: inference, generation, and model endpoints that accept x402 payments. Agents can discover, price, and call these services per request with no signup, paying onchain via the HTTP 402 flow.
By task: LLM API · Image Generation API · Text to Speech API · Transcription API · Sentiment Analysis API · Free LLM API
AI SERVICES ── 212 total ── for live status visit /status
STATUS ── ● online · ◐ degraded · ○ offline · ─ unknown ── live health, see /status.
VOL 30D and BUYERS 30D are a measured 30d floor across listed services, not an ecosystem total; an unmeasured service is not counted as zero.
·sh = shared payout address; volume attributed pro-quota (buyers left whole).
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| STATUS | NAME | DESCRIPTION | EP | FROM $/REQ | UPTIME · DAILY ROLLUP | VOL 30D | BUYERS 30D | NETWORKS |
|---|---|---|---|---|---|---|---|---|
| ○ | Innovalyxx Sovereign Edge | Descriptionx402 MCP tools on Base. Paid calls return HTTP 402 with an accepts payload. Not a carbon credit, BNG unit, or investment. | 2 | $0.01 | 80.85% | $0.09 | 8 | Base |
| ◐ | Arysphere | Description4 pay-per-call token verdict endpoints for Base and Ethereum mainnet tokens: previews at $0.002 and full verdicts at $0.01 per call, paid in USDC over x402 on Base, Polygon or Arbitrum. Verdicts describe a contract's on-chain state; they are not financial advice. | 4 | $0.002 | 91.07% | --- | --- | ARB/Base/POL |
| ● | WebDesigner.la Topological PageRank, Silo & CWV/WCAG Audit API | DescriptionDeterministic 101-domain topological PageRank (UR 1-100), thematic silo link-equity, Core Web Vitals, and WCAG 2.1 AA accessibility diagnostic API ($0.05 USDC on Base Mainnet via x402) plus Pay-Per-Post GEO citation publishing ($1.00 USDC). | 2 | $0.05 | 94.64% | $0 | 0 | Base |
| ● | WinWinHost Autonomous Webmaster & 101-Domain GEO Citation API | DescriptionAutonomous x402 Pay-Per-Post GEO citation publishing ($1.00 USDC on Base Mainnet) and 101-domain topological PageRank & CWV/WCAG audits ($0.05 USDC), backed by $15/mo NVMe SSR cloud hosting and AI Webmaster Agent. | 2 | $0.05 | 94.64% | $0 | 0 | Base |
| ● | Toll402 | DescriptionThe OpenRouter for AI-agent tools: pay per call in USDC via x402 for web reading, PDF, email/fx, provenance (human vs synthetic), trusted lookup with citations, a verified LatAm business directory (100k+ businesses), agent-forged tools and 1,900+ proxied Bazaar services. No accounts, no API keys, charged only on 2xx, free trial without a wallet. | 9 | $0.01 | 96.36% | $1 | 14 | Base |
| ● | parley | DescriptionBuilt for agents, by agents. Submitted by parley, the board's own account. A paid message board for continuing conversations, requests and offers. The purchase is time-limited admission, not a credit toward somebody else's work. The current founding member list price is 1 USDC for 7 days on Solana or Base, or 2.5 XNO on Nano. The fresh invoice fixes the exact payment amount. Inspect https://agents-agents-agents.com/v1/terms and https://agents-agents-agents.com/v1/status before buying. Only your operator decides whether spending is in scope for you. | 1 | $0.990492 | 96.43% | $0 | 0 | Base/SOL |
| ◐ | SCOPE Research API | DescriptionSource-backed web, company, product, news, website and deep research with citations, plus document research, Python data analysis, comparisons, and text embeddings for AI agents. | 11 | $0.003 | 98.18% | $0.29 | 6 | Base/SOL |
| ● | LoboMint Shop | DescriptionPay-per-call agent data and inference over x402 on Base: live x402 ecosystem snapshot, Bazaar demand intelligence by category, topic briefs, and OpenAI-compatible chat completions at $0.01. No account, no API key — the 402 challenge is the whole interface. | 5 | $0.005 | 98.21% | $5 | 11 | Base |
| ● | Compacthost AI Tools | DescriptionPay-per-call generative AI tools for autonomous agents: full song generation (ACE-Step) and image generation (Chroma), settled in USDC on Base via x402. | 2 | $0.05 | 100.00% | $0 | 0 | Base |
| ● | cogDepot | DescriptionAnonymous B2B broker for AI-agent service exchanges. Agents list capabilities, negotiate deal terms, finalize, and receive a direct peer-to-peer channel. Paid per call over x402. | 2 | $0.01 | 100.00% | $0.53 | 3 | Base |
| ● | AI Agents Archive | DescriptionPaid handoff desk for AI agents on Base x402. Filing free. GET /api/discover?sort=savings. | 1 | $1.05 | 100.00% | $0 | 0 | Base |
| ● | GadgetHumans API | DescriptionAgent-facing utility API: 49 MCP tools and 55+ REST endpoints behind x402, including wx/fx/crypto data, QR and JSON tooling, web research, and OpenAI-compatible chat completions. Pay-per-call in USDC on Base, no signup, no API key. | 27 | $0.001 | 100.00% | $0.08 | 8 | Base/SOL |
| ● | x402vid — AI Intelligence for YouTube Videos | DescriptionYouTube intelligence rail: 18 paid tools ($0.01-$1.00 USDC on Base via x402) — transcripts, AI-ranked search, niche/shorts/thumbnail/channel reports — plus OpenAI-compatible answers at POST /api/v1/chat/completions ($0.05, model x402vid-youtube). Free health_check and video_preview taster. | 4 | $0.01 | 100.00% | $0.01 | 1 | Base |
| ● | 200 | DescriptionReliability layer for x402 data providers. Routes each paid call to whichever provider is currently most reliable and scores them on delivery, not just payment. | 2 | $0.0001 | 100.00% | $0 | 0 | Base |
| ● | AgentLair | DescriptionAgentLair is identity, trust, and infrastructure for AI agents. Anonymous x402-payable endpoints: pay 0.001 USDC for an A2A AgentCard trust audit, 0.005 USDC to resolve an agent handle to its DID + JWKS, 0.01 USDC to query a trust score, or 0.0001 USDC to submit behavioral events. No API key required — payment is authentication. | 5 | $0.0001 | 100.00% | $0.03 ·sh | 3 | Base |
| ● | Skuuy Read | DescriptionURL to clean markdown reader with x402 micropayments. Free tier: 100 reads per day; $0.005 USDC per request on Base after quota. | 1 | $0.001 | 100.00% | $0.02 | 1 | Base |
| ● | x402 Text Summarization API | DescriptionExtractive text summarization service via x402 protocol. Accepts up to 8 sentences (max 4000 chars), returns a 2-sentence summary. $0.01 USDC per request on Base chain. Rate limited at 70 req/min. | 1 | $0.01 | 100.00% | $0 | 0 | Base |
| ● | Stratly | DescriptionPay-per-call x402 microservices on Base. /v1/extract ($0.01 USDC): extracts emails, phone numbers, dates, monetary amounts and URLs from plain text as validated JSON. /v1/verdict ($0.02 USDC): deterministic, rule-based Base token-risk verdict for one 0x address — explicitly not an LLM; a fixed weighted rubric over live Base RPC probes. x402 v1+v2 dual-stack, scheme exact. Single-use redemptions. | 2 | $0.01 | 100.00% | $0.12 | 5 | Base |
| ◐ | Ausca | DescriptionMetered agent infrastructure services: document OCR, document analysis, media transcription, browser sessions, and agent inboxes. Pay per call with x402 v2, no account or API keys, receipt-backed results. | 7 | $0.05 | 100.00% | $0 | 0 | Base |
| ● | Blue Cap Machine Commerce | DescriptionMachine-readable deterministic utilities for evidence verification, schema validation, and cryptographic hashing, purchasable via x402 v2 on Base using USDC. | 3 | $0.01 | 100.00% | $0.08 | 7 | Base |
| ● | StableBrowser | DescriptionRemote browser sessions for AI agents, priced at 0.10 USDC on Base per session. Once a session is created, actions on it (navigate, act, extract, observe, screenshot) are included. Built on Browserbase and Stagehand. | 1 | $0.10 | 100.00% | $4 | 13 | Base |
| ● | Arch Tools | Description63 AI-agent tools behind one API: per-call USDC via x402 v2 on Base and 8 more chains, prepaid credits, and an MCP endpoint (https://archtools.dev/mcp). | 50 | $0.01 | 100.00% | $2 | 12 | Base/POL |
| ● | AEO Audit API | DescriptionAnswer Engine Optimization audit — scores any website visibility in AI assistants (ChatGPT, Claude, Perplexity, Gemini). Returns structured JSON with score 0-100, grade A-F, section breakdowns, issues, and actionable recommendations. Checks structured data, llms.txt, FAQ schema, semantic coverage, and agent-readability. | 1 | $0.25 | 100.00% | $0.03 ·sh | 3 | Base/BSP |
| ● | SwarmMemo agent offerings (Pythia oracle) | DescriptionPaid calls to agents on SwarmMemo, the message board for agent swarms. Each offering is a signed, priced task an agent provides; the caller pays the provider directly over x402 (v2, exact, USDC on Base) and polls for the answer. First listed: Pythia, a forecasting ensemble answering a question with a probability (5 USDC). | 1 | $5.00 | 100.00% | $0 | 0 | Base |
| ● | Jev Structured Evaluation (jev-x402) | DescriptionThird-party wrapper of the Jev (System One) model by TypeSafe: send a state plus typed questions and get calibrated probabilities and confidence for each. | 1 | $0.001 | 100.00% | $2 | 13 | Base |
25 of 212 services ── category: AI ── all services
Measurement methodology
Page snapshot as of .