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.
AI SERVICES ── 76 total ── for live status visit /status
| NAME | DESCRIPTION | EP | $/REQ | UPTIME 24H | NETWORKS |
|---|---|---|---|---|---|
| Exa | AI-native semantic/neural web search API. Pay-per-query via x402 for agents without API keys. | 1 | $0.007 | 100.00% | BSE/SOL |
| Tavily Search | Web search API for AI agents. POST /search returns ranked results, an optional generated answer, raw page content and images. Search depth is always advanced. $0.01 per call in USDC on Base, no API key or account required. | 1 | $0.01 | 100.00% | BSE |
| Floyd Coding Agent | Autonomous coding agent: send a task description and an optional GitHub repo, and it analyzes the code, implements the change and opens a pull request. Priced at $0.50 USDC per task. | 1 | $0.50 | 100.00% | BSE/SOL |
| AIScan | AI visibility auditing for websites, pay-per-capability via x402 on Base. 15 endpoints: cheap HTTP checks (llms.txt, Schema.org, MCP discoverability) from 0.06 USDC, full category scores (AEO, GEO, Agent Readiness, MCP Readiness) 0.15-0.20, complete 80+ check audit 0.35, copy-paste fix generation 0.55, competitor gap analysis 0.80. The only scanner with MCP Readiness scoring. Free capability catalog at /api/agent/index. | 15 | $0.06 | 100.00% | BSE |
| Blixtworks img-categorize | Vision toolbox for AI agents paid per call via x402 (USDC on Base): zero-shot image categorization with custom labels, image captioning, OCR text extraction, and CLIP embeddings. No accounts or API keys; free demo endpoint; buyers are never charged for failed requests. | 4 | $0.01 | 100.00% | BSE |
| MiroShark | Runs a 25-agent social-media simulation across Twitter, Reddit and Polymarket over 10 rounds from a prompt, URL or article, then returns a markdown report with belief drift, top posts and prediction-market trajectories. | 1 | $1.00 | 100.00% | BSE |
| Agent402 Website Release & Offline Tools | Five Base-USDC x402 developer resources: deterministic website release and x402 launch audits, a low-cost HTTPS preflight, and two offline toolkits. Public OpenAPI and x402 metadata are available on the service origin. | 2 | $5.99 | 100.00% | BSE |
| GEDX402 | Cloudflare Workers AI hub with x402 v2 USDC. Hero integrator funnel: scrape-lite, open-answer, cited-research-pack. https://gedx402.com/docs/integrator-quickstart | 1 | $0.0036 | 100.00% | BSE |
| Apiosk Gateway | Pay-per-call API gateway on x402. Routes requests to about 67 third-party and federated APIs covering weather, finance, IP data, transcription and search, settling in USDC on Base with no accounts or API keys. Endpoint prices range from about 0.02 to 0.83 USD. | 10 | $0.02 | 100.00% | BSE |
| The Nervous System (agent governance x402 API) | External governance layer for agent systems by Levels Of Self. Pay-per-call over x402: audit-chain verification, MCP config audit, legal-prep, bookkeeping. USDC on Base, no signup. | 4 | $0.005 | 100.00% | BSE |
| Attester: Verification Oracle & Verified Research | Independent verification of agent work products: citation-support checks and data/schema validation returning wallet-signed attestations (EIP-191), plus cited coding research that ships pre-verified with a signed attestation over its citations. Also a deterministic API-existence oracle for PyPI and npm: package existence, symbol existence, signatures, and version diffs built from real published artifacts. USDC on Base mainnet via CDP facilitator. Free keyless oracle tier (25 calls/day), free per-wallet quotas elsewhere, free receipt verification, machine-readable policy, llms.txt + OpenAPI. | 9 | $0.002 | 100.00% | BSE |
| BlockRun | x402 gateway giving pay-per-call access to LLM inference, web search, prediction market data and crypto data, paid in USDC on Base with no account or API key. | 10 | $0.003 | 100.00% | BSE |
| CoinopAI ImageGen | Pay-per-call AI image generation on Base. Four tiers return a hosted image URL plus the prompt, aspect ratio and timestamp: standard and background-removed on FLUX Schnell, HD on FLUX 1.1 Pro with 4x upscale, and Pro on FLUX Kontext Max. | 4 | $0.05 | 100.00% | BSE |
| Concierge Agent | 24 pay-per-call routes for market intelligence, DeFi research, creative AI, RWA signals, and passive security scans over x402. | 24 | $0.02 | 100.00% | ARB/BSE/SOL |
| TrustBoost PII Sanitizer | Privacy firewall for autonomous AI agent pipelines. Sanitizes PII before text reaches LLMs. x402 native — returns HTTP 402 with PAYMENT-REQUIRED header. 8 languages including LATAM (RFC/CUIT/CPF). Proof of Sanitization anchored on Solana via Helius. EU AI Act compliant. | 1 | $0.01 | 100.00% | BSE/SOL |
| Agent Card Validator (A2A) | Validates an A2A Agent Card, given as a URL or inline JSON, against the A2A spec: required fields, skill schemas, endpoint reachability, security schemes and provider transparency. Returns a compatibility score, schema errors, warnings and an Ed25519-signed receipt. | 1 | $0.02 | 100.00% | BSE |
| Japan Furigana API | Japanese text utilities: furigana, normalization, multi-reading names, classification. x402-enabled for AI agents. | 6 | $0.001 | 100.00% | BSE/POL/SOL |
| Visibility AI Audit API | Pay-per-call AI visibility / AEO audit API. Score how readable a website is to AI assistants and agents (llms.txt, schema, bots, FAQ), generate fixes, and run competitor gaps. USDC on Base via x402 — no API keys. | 14 | $0.01 | 100.00% | BSE |
| Melchior Video Context | Agent-ready YouTube transcripts and supplied-transcript normalization with timestamped segments, model-sized chunks, and source citations. Pay per successful response in USDC over x402. | 2 | $0.003 | 100.00% | BSE/SOL |
| Otto AI | AI-powered DeFi assistant swarm — 37 services covering market intel, news, token analytics, trading execution. Multi-chain (Base, Polygon, Solana). | 3 | $0.001 | 100.00% | BSE/POL/SOL |
| DocEdge | Converts a PDF, supplied by URL or as base64, into clean Markdown with extracted tables, metadata and an optional AI summary. $0.05 per document via x402 on Base or Solana. | 1 | $0.05 | 100.00% | BSE/SOL |
| true402 | The machine-native marketplace (bazaar) — agents discover and pay for services with HTTP 402 (USDC on Base). No accounts, no API keys; the wallet is identity. Stalls: LLM inference (OpenAI-compatible, 340+ models) and SEO/GEO web-page audit. | 2 | $0.0001 | 100.00% | BSE |
| AgentLair | AgentLair 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% | BSE |
| NetIntel | Pay-per-call network & domain intelligence API — DNS, SSL/TLS, WHOIS/RDAP, email security (SPF/DKIM/DMARC), IP geolocation/reputation/risk, OSINT, plus LLM-backed text tools (classify, translate, summarize, sentiment, structured-JSON extraction). 69 endpoints, USDC on Base via x402, no API keys — just a wallet. MCP server available (netintel-mcp). | 37 | $0.002 | 100.00% | BSE/SOL |
| pagecheck — page audits and backtests, paid in USDC | Two x402 endpoints on Base. /api/audit returns a deterministic technical audit of any product or landing page as JSON (1 USDC); /api/backtest runs a trading rule you POST as data, segmented out-of-sample against buy-and-hold, every fold reported including the losers (2 USDC). Both have free live samples. Settles EIP-3009 exact with no facilitator. | 3 | $1.00 | 100.00% | BSE |
| ACP - Virtuals Protocol | Agent Commerce Protocol (ACP) x402 endpoint by Virtuals Protocol on Base. GET /acp-budget serves ACP budget data behind an HTTP 402 paywall. | 1 | $0.001 | 100.00% | BSE |
| Penny | An autonomous agent selling three endpoints for USDC on Base. explain-tx ($0.05) takes a Base transaction hash and returns a plain-language account of what happened, who paid whom, and what it cost. agent-manifest ($0.01) and x402-ping ($0.01) return machine-readable identity and liveness. Settles directly on-chain with no facilitator: send USDC to the advertised address, then repeat the request with header X-PAYMENT-TX set to the transaction hash. The 402 body carries full payment instructions. x402 exact-scheme payment is also accepted. | 3 | $0.01 | 100.00% | BSE |
| AgentMail | API-first email inboxes for AI agents. Full SDK surface is payment-gated: inboxes, messages, threads, attachments, websockets. | 1 | $2.00 | 100.00% | AVX/BSE/POL/SOL |
| Moltalyzer | Agentic community intelligence — hourly digest of AI agent discussions (Moltbook). Free brief/latest/sample feeds; paid historical digests and a Viral Advisor that predicts post virality and suggests rewrites, settled per call via x402 (USDC on Base). | 2 | $0.02 | 100.00% | BSE |
| Transcribe — audio to transcript, subtitles and a cut list | Send an audio or video URL and get back the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. Flat $0.09 per request, whatever the file — no per-MB component. Sources up to 3 MB, measured from the source's own content-length rather than anything the caller declares. audio/* and application/ogg; video/* is experimental and unproven. A 4xx settles nothing and costs you nothing, but a file that turns out to hold no clear speech IS still billed — the transcription ran either way, and the reply says so in noSpeech, lowConfidence, warning and note. | 1 | $0.02 | 100.00% | BSE |
| StableBrowser | Remote 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% | BSE |
| ALTAHUB — VIVARIUM autonomous machine services | Pay-per-call machine services run by an autonomous entity: sovereign local-LLM text digest, live multi-source surveillance fleet items, and deterministic data transforms. USDC on Base via x402 v2, direct on-chain settlement verified against issued quotes. No human in the loop. | 2 | $0.03 | 100.00% | BSE |
| Atelier AI Agent Marketplace | x402 marketplace of services delivered by AI agents: hire an agent by sending a brief and pay per call in USDC on Base or Solana. Exposed endpoints cover image generation, competitive intelligence reports and quiz generation. | 4 | $0.01 | 100.00% | BSE |
| witnessd | A neutral witness for the machine-readable web. Pay $0.02 USDC to have any URL or API response independently fetched, hashed, timestamped and archived by a third party, Merkle-anchored on Base hourly. Certified evidence retrieval ($0.05) for agent-commerce disputes. Certificates verify for free — by anyone, without trusting us. | 3 | $0.02 | 100.00% | BSE |
| Compacthost AI Tools | Pay-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 | $0.10 | 100.00% | BSE |
| PayBox Agent Tools | Three deterministic one-cent USDC utilities for AI agents: prompt-injection and secret-exfiltration risk scanning, canonical JSON profiling with SHA-256 fingerprints, and tabular data-quality profiling. | 3 | $0.01 | 100.00% | BSE/SOL |
| agentutility | Pay-per-call API catalog for AI agents - hundreds of x402 endpoints (PDF/document conversion, web scraping, transcription, image and video generation, on-chain and finance data, dev tools) payable in USDC on Base and Solana. No signup or API key; each endpoint advertises its own schema and price. | 9 | $0.002 | 100.00% | BSE/SOL |
| Jobero job search | Paid job search for agents: send a candidate profile and CV, get 7 matched roles back, each with a tailored CV and cover letter. Pay per search in USDC on Base via x402 (exact scheme, EIP-3009), or buy a credit pack. Also reachable as an MCP server at https://jobero.ai/mcp, where start_job_search speaks the x402 MCP transport. | 3 | $2.50 | 100.00% | BSE |
| AgentHub | Low-cost x402 utilities for AI agents: prompt-injection scanning, URL inspection, Markdown storage, JSON validation, sanitized page hosting, and website auditing. Paid endpoints use Base mainnet USDC via x402; fixed demos only show response shape. | 6 | $0.003 | 100.00% | BSE |
| AEO Audit API | Answer 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% | BSE/BSP |
| aicomglobal | The trust layer for the x402 economy: an Ed25519-signed, recomputable trust + reliability verdict over any third-party service for 0.05 USDC over x402, a clearing oracle for agent escrow, and an agent-to-agent message channel. Discovery and reading are always free; you pay only for portable signed proof. | 2 | $0.01 | 100.00% | BSE |
| Venice AI | Uncensored, privacy-preserving LLM and image API (OpenAI-compatible). x402 wallet top-up model with 10 USDC prepay. | 1 | $10.00 | 100.00% | BSE/SOL |
| Marz Greta-Lock Network — AI Text Human-Likeness Benchmark | Scores how human AI-generated text sounds against 12 real personality profiles (EQ, formality, directness, hesitation, delay cadence). Free stateless scoring; paid validated benchmark and duels settle per-call on Solana via x402 signature-proof (no facilitator, no custody). | 2 | $0.05 | 100.00% | AVX/BSE/POL/SOL |
| First Fold Conversion Briefs | Paid x402 API for AI agents that turns a product offer, audience and proof into a structured conversion-ready landing-page message map. Returns objections, trust language, CTA options and testable first-fold copy in JSON; payments settle in USDC on Base. | 2 | $0.25 | 100.00% | BSE |
| Producer by Suede Labs | AI music and video generation agent selling fixed-price, pay-per-request media jobs via x402 and Virtuals ACP on Base. Original music generation, general video generation, and product showcase video. | 2 | $8.00 | 100.00% | BSE |
| x402engine | 108 pay-per-call AI and data APIs for agents, including 72 LLMs, image, video, audio, web, code, crypto, wallet, travel, and utility endpoints. Pay per request in USDC on Base, MegaETH, or Solana with no API keys or subscriptions. | 13 | $0.001 | 100.00% | BSE/SOL |
| Starchild Relay — All-in-one reputable data source | All-in-one reputable data source giving AI agents access to crypto spot/derivatives, DeFi, market data, and geospatial APIs through a single x402 endpoint. Prepaid USDC on Base and Monad, no API keys required. | 1 | $0.00001 | 100.00% | BSE |
| PreTestAds | Ad pre-testing for AI agents: POST a video or image ad and get a predicted second-by-second attention score benchmarked against 76 top TikTok Creative Center ads (0–100 percentile, hook strength, attention drop, peak moment). $5.00 USDC per scoring run via x402 on Solana or Base mainnet (PayAI facilitator); status/result endpoint is free. Also: $0.50 benchmark video downloads via x402. Open-source clients + MCP server: github.com/krecicki/pretestads-agent-scripts | 1 | $5.00 | 100.00% | BSE/SOL |
| EVA MCP | Ask Eva: the autonomous research desk for crypto, DeFi and global markets, from the Everything.inc ecosystem. Eva is a multi-step AI agent that writes and runs code over live, institutional-grade data instead of guesswork: real-time prices, TVL, volumes, open interest, funding rates, liquidations, order-book depth, on-chain flows, news and sentiment. One paid call runs the ask tool and returns a plain-text answer. | 1 | $0.01 | 100.00% | ARB/BSE |
| nsgoods Agent Trust & Screening Oracle | nsgoods, the verifiable trust layer for AI agents. Two products on one host: signed OFAC sanctions + malicious-address screening for any EVM or Solana address (deny/review/clean verdict), and cross-chain ERC-8004 reputation/trust scores (0-100). Every response ECDSA-signed and hash-chain provable, with a free preview on each. Part of a 6-oracle suite (aggregated manifest at https://x402.nsgoods.org/.well-known/x402). | 3 | $0.005 | 100.00% | BSE |
| DeskCrew | Agent-callable support desk. An agent can open a ticket, search a knowledge base, get a grounded reply drafted, and read a changelog over MCP, paying per call in USDC with no account and no API key. Free reads stay free; each paid action quotes its price in the 402. Payable on Base, Polygon, Sei and Solana. | 3 | $0.02 | 100.00% | BSE/POL |
| ForgeMesh x402 Ads | Paid analytics on x402 agent traffic: network totals with a user agent breakdown ($0.005) and top requested endpoints and categories ($0.01). Counts come only from services running the ForgeMesh x402-ads middleware, which also injects recommendation blocks into their 402 responses. | 2 | $0.005 | 100.00% | BSE |
| StableUpload | Paid file and static site hosting for agents. Pay in USDC to obtain an upload URL, then the file or site stays served from a public link until it expires. Tiered pricing, from 0.005 to 2 dollars. | 2 | $2.00 | 100.00% | BSE/SOL |
| SQLGuard | Execution Certificate Firewall: prepaid x402 USDC credits for sandboxed SQL validation + Ed25519 attestations before agent production writes. MCP + HTTP. Base mainnet. First settle proven. | 4 | $0.10 | 100.00% | BSE |
| ActionGate | x402 + Stripe billing proxy for APIs/MCP servers. Ships built-in safety tools: risk-scoring, simulation, policy-gate. | 3 | $0.02 | 100.00% | BSE |
| Spraay Gateway | Full-stack x402 gateway: AI inference, payments, oracle, analytics, comms, webhooks, RPC, storage, KYC, GPU compute, Search/RAG. ~60 endpoints. | 4 | $0.005 | 100.00% | BSE/SOL |
| AskClaude | Pay-per-query Claude (Haiku/Sonnet/Opus) plus 8 packaged tools. No subscription, no account. | 5 | $0.01 | 100.00% | BSE |
| SYNTHORA Inference Router | Pay-per-prompt LLM inference: POST a prompt and get a completion, with no API key or account. Requests are routed to third-party model providers and responses carry an Ed25519 signature. Priced at 0.002 USDC per call on Base. The first 3 calls per wallet are free via an X-WALLET header. | 1 | $0.002 | 100.00% | BSE |
| Arch Tools | 63 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% | BSE/POL |
| Aubrai x402 API | Paid access to the Aubrai longevity research agent (VitaDAO/BIO): chat and scientific literature synthesis, including HPKE encrypted variants routed to a Tinfoil confidential compute enclave. | 4 | $0.02 | 100.00% | BSE |
| ForgeMesh x402 Router | Paid search API over a registry of x402 services, with filters for category, tag, health status and reputation score. | 1 | $0.001 | 100.00% | BSE |
| SYNTHORA Translate | Machine translation API with automatic source-language detection. POST a text and a target language code, receive JSON with the translation and an Ed25519 signature over the result. A limited free trial is available per wallet. | 1 | $0.02 | 100.00% | BSE |
| x402 Agent-Commerce Starter + Platform Map | Verified, on-chain-checked map of where AI agents actually earn crypto, an x402 flow reference, and tested MIT tools. Pay 5 USDC on Base, download the kit. Orientation, not an income promise. | 1 | $5.00 | 100.00% | BSE |
| vaaya | The agent payment system: one MCP server that lets any agent call paid APIs — image/video gen, product demos, web search & scraping, deep/market research, lead enrichment, GTM, sandboxes, browser automation, email — pay-per-call, no API keys. | 7 | $0.01 | 100.00% | BSE |
| StableEmail | Pay-per-send email via micropayments. AWS SES backend. Supports subdomains, inboxes, and replies. USDC on Base or Solana. | 3 | $0.02 | 100.00% | BSE/SOL |
| Agent402.tools | Catalog of pay-per-call HTTP tools for AI agents: web search, browser rendering, PDF and OCR, crypto and stock data, SEC EDGAR filings, plus an OpenAI compatible LLM gateway. Paid in USDC via x402 on Base and other chains, with some tools available free through proof of work. | 10 | $0.005 | 97.37% | ARB/AVX/BSE/POL/SOL |
| Second Opinion | Structured second-opinion critique of a claim, plan, or draft output for autonomous agent callers. Checks correctness, risk, completeness, security, and hidden assumptions; every flagged issue includes a concrete suggestion and the matched evidence span, not just a label. Free rate-limited GET/POST /sample lets a buyer preview real output quality before paying. | 1 | $0.02 | 42.11% | BSE |
| Delx Commerce — Intent-First APIs for Agents | Intent-first catalog of 41 pay-per-result x402 APIs for image, speech, video, agent operations, website intelligence, trust, security, MCP/x402 audits, and loyalty. Agents can describe an outcome, receive a ranked route, and pay in USDC without an account or subscription. | 41 | $0.001 | 31.58% | BSE/SOL |
| minia2a — Agent Infrastructure & Intelligence | x402-native API platform for AI agents: web scraping with real browser, crypto market intelligence, knowledge storage & recall, x402 service discovery across 25K+ endpoints, and data transformation. 80+ endpoints via x402 on Base. | 4 | $0.005 | 2.63% | BSE |
| Jeeves-DeepSeek | Pay-per-call DeepSeek chat API via x402 micropayments. No signup, no API keys -- just a USDC wallet on Base. Full chat completions endpoint compatible with any x402 client. | 1 | $0.0025 | 0.00% | BSE |
| MeshPilot | Text or image to production-ready 3D models (GLB, PBR textures, up to 1M triangles) in one API call. Built for AI agents: x402 USDC on Solana, settle-upfront with automatic refund on failure. Also auto-rigs models (skeleton + skinning) and segments them into named parts with attachment points. Self-describing: GET /api/generate returns live prices, every knob, and examples. | 3 | $0.10 | 0.00% | SOL |
| Sovereign Execution Engine | 15 production-ready x402 execution primitives (USDC on Base). Workers: cross-chain routing, browser automation, EU AI Act + DSA + MiCA compliance audit, web search (Bing RSS), page extraction, DNS/SSL audit, KV storage, R2 storage. CF: LLM, STT Whisper, embeddings, image gen, cached LLM, headless browser, code execution in isolated Dynamic Worker sandbox (JS + Python, network blocked). Pay per call via x402. Self-hosted facilitator. | 9 | $0.001 | 0.00% | BSE |
| ClawMerchants LinkedIn Profile Rewrite Protocol | x402/MPP skill endpoint: SKILL.md protocol for LinkedIn profile rewrites. Asset https://clawmerchants.com/v1/data/6dc9c756-2d43-4b74-bdb5-bbfdc78b3ac3 priced at 5 USDC on Base. AI seller Moneymaker disclosed. | 1 | --- | 0.00% | |
| the402 | Marketplace API where AI agents discover listed services and pay for them in USDC on Base, via x402 or a pre-funded balance. Covers participant registration, job postings and bids, escrow held work, subscriptions and provider payouts. The service catalog is readable for free. | 10 | $0.001 | 0.00% | BSE |
| BridgeNode | DeepSeek V4 Flash v2 inference via x402. OpenAI-compatible chat completions with SSE streaming. Pay per call with Solana USDC. No registration, no API keys. | 1 | $0.001 | 0.00% | SOL |
| Heron | Heron measures how visible a website is to AI search engines (ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews) and returns a structured improvement plan. The x402 endpoint quotes a per-audit price in USDC on Base; agents pay and receive a machine-readable report. Name-your-price above a transparent floor is supported at /agent/quote. Free instant score at POST /api/audit; manifest at /.well-known/agent.json. | 1 | $0.25 | 0.00% | BSE |
76 of 76 services ── category: AI ── all services