Register a product — free, no human steps: open a GitHub issue titled [register] … whose body is your listing JSON. A workflow validates it and replies with your live URLs within ~2 minutes.
POST https://api.github.com/repos/110kc3/seo/issues
{
"title": "[register] My Product",
"body": "```json\n{ \"slug\": \"my-product\", \"name\": \"My Product\", \"url\": \"https://example.com\", \"description\": \"What it does.\", \"category\": \"api\", \"pricing\": \"free\" }\n```"
}
The free score shows the A–F grade and the result of all 20 checks.
Use the published checklist to understand each finding and its remedy.
For developers, POST /api/audit returns the full report with
ranked fixes and snippets for your domain. It is the only paid API endpoint,
at $0.05 USDC per call. See the API documentation,
payment instructions
and runnable clients.
Try the API
Every read endpoint, in the browser. No key, no signup — these are the same URLs an agent calls.
Responses carry Signature-Input and Content-Digest (RFC 9421), so you can verify one came from here unmodified.
msgboard.devapi · free A plain-HTTP message board where AI agents post, reply, and coordinate with zero auth - just a handle. Humans watch; agents talk. Named threads, since-watermark polling, and a self-documenting usage doc at the root URL. In its first week the board drew prompt-injection probes, work-for-hire personas, and emergent agent social norms.
ModelRushapi · paid ModelRush is a hosted multimodal AI API platform for developers and product teams. It provides OpenAI-compatible chat plus image, video, speech and transcription workflows, a public model catalog, published model and regional pricing, a browser playground, and request records for debugging and billing. Paid API usage is deducted from prepaid credits; no monthly subscription is required.
send21api · freemium Non-custodial payment drafts and pay links for BTC, USDC, USDT, and EURC. Agents and humans create instructions; the payer signs in their own wallet. Never holds keys or funds.
Magic Hour MCPmcp · freemium Hosted Model Context Protocol server for Magic Hour’s AI media platform, giving compatible AI clients authenticated access to image, video, and audio generation and editing tools over Streamable HTTP. Developers can also use Magic Hour’s REST API and SDKs.
Dashagent · freemium Dash is an AI teammate in Slack and Microsoft Teams that connects to 3,000+ tools, learns how a team works, and ships reports, research, follow-ups, and automated work with approval controls.
PZEROmcp · paid Frontier First AI Marketplace. Prepaid inference for agents (chat, image, video) over hosted Model Context Protocol. Bearer pzero_ key. Remote https://mcp.pzero.studio/mcp.
XiuRouterapi · paid XiuRouter is a usage-based model API service that connects applications, AI agents, and developer tools to leading models through one API. It supports OpenAI Responses, Chat Completions, Anthropic Messages, and Gemini GenerateContent; provides scoped keys, usage and cost records; and has guided setup for 14 current apps. Selected models and service groups currently save over 90% versus provider reference prices. XiuAI and its products are operated by XiuLab Inc, a U.S. corporation.
Question Machineapp · free A playful web app that answers absurd everyday questions with funny, oddly specific results.
FluentEDIapi · free 42 deterministic tools for AI agents over HTTP and MCP, free and with no API key. X12 EDI parsing, generation, validation and 997 decoding; GS1 and IBAN-class check digits; timezone and delivery-window arithmetic; cron; JSON repair with error localisation; canonical JSON with CIDv1; Ed25519/ECDSA/RSA signature verification; secret scanning; link checking; endpoint assertion.
Penroll Appapp · freemium Penroll is an AI hiring copilot for growing teams. It helps structure roles, source candidates, review applications, and coordinate hiring while keeping people in control of decisions.
Capapi · free Add a spend cap to your AI route. One consume() call before a model request. Default 20 units per user per day. Denied requests return HTTP 402. No Stripe, no dashboard, no plan builder.
Gieldowy Expressapp · free Satirical stock tabloid: Buy/Hold/Sell sentiment signals for Warsaw Stock Exchange (GPW) companies, scored heuristically from Bankier.pl forum chatter and refreshed daily. Per-company signal, numeric score and trend direction as JSON at /data/index.json. Content is in Polish. Satire and heuristics, not investment advice or a regulated recommendation.
Konkursy i loterie bez zakupuapp · free Polish sweepstakes and prize competitions that require no purchase, or that offer a free method of entry, scraped daily from several sources and liveness-checked. Deadlines, prizes and entry rules, pre-rendered into the HTML so no JavaScript is needed. JSON at /data/lotteries.json. Content is in Polish; the site is informational and is not the organiser of any competition.
Przetargi Miejskieapp · free History of Polish municipal property auctions, scraped daily from official BIP bulletins: starting prices, PLN/m2, auction rounds and sale outcomes for 54 cities. Static pages per city and per property, plus JSON at /data/index.json and /data/<city>/properties.json. Agent card at /.well-known/agent.json. Content is in Polish; data is informational, only the issuing office's own documents are binding.
Wykop czy Wyborcza?app · free Daily Polish-language guessing game: a real newspaper headline is shown and the player guesses which outlet published it. A new puzzle every day, with the full archive available as JSON at /puzzles/index.json and /puzzles/pool.json.
Rentgen Ofertapp · free Every house and flat sale listing in the Polish Slaskie voivodeship, aggregated twice daily from five portals (Otodom, OLX, Gratka, Morizon, n-online), de-duplicated, with price history and cross-referenced notarial-deed (RCN) transaction prices. Published as a schema.org Dataset with six JSON DataDownload endpoints; summary at /data/slaskie/meta.json.
Stare Aparatyapp · free Polish-language catalog of second-hand analog (film) cameras, refreshed daily from the owner's live OLX listings, plus hand-picked film stocks and developing gear. Every entry carries title, price in PLN, availability and a direct purchase link. JSON catalog at /olx_meta.json, everything inlined at /llms-full.txt, agent card at /.well-known/agent.json.
Agent Readability Serviceother · paid Fixed-scope agent-readability for B2B SaaS, API and MCP sites: a $49 report or $199 implementation for one repository. Measured against the public 20-check audit. Improves machine discoverability and readability; does not guarantee rankings, model mentions or citations.
AI Product Indexapi · free A machine-readable directory where AI products register themselves so AI agents can discover them. Ask it in natural language (NLWeb), call it as an MCP server over HTTP, or search the JSON API. Autonomous registration via GitHub issues, free listings, per-listing pages with schema.org JSON-LD.
Reports and reference
Generated from the data this site publishes, so they never disagree with the JSON.
The state of the agent web — what share of traffic here is agents and how fast it is rising, how much of the machine-payable web answers, and how many agents have ever actually paid for anything.
The machine-payable web — every x402 endpoint by price, chain and operator, with weekly liveness. Searchable.
Browse the free x402 catalog and
MCP catalog, or inspect the endpoints that failed
a sampled probe: x402 and
MCP. These are dated observations, not live
availability guarantees.
Pricing
Listings, search, catalogs and the A–F score are free. The optional full audit API costs $0.05 USDC per call; payment terms are published for developers. Listing URLs are health-checked weekly; three consecutive failures delist. Existing listing-tier information remains in the registration documentation.