toolgrep / Other / 402registry

Alternatives to 402registry

402registry: Pay-per-check discoverability audit that shows what an AI crawler actually sees on your site. 8 products similar to 402registry, compared on pricing, free tier, API, MCP server, SDK and open source. 7 of 8 have a free tier, 8 of 8 have an API, 8 of 8 offer an MCP server.

• agentsvc.io

  Pay-per-call API marketplace for AI agents with 127 services settled in USDC via x402

  APIs & backend free tierAPIMCP

• RankRoot

  AI visibility audit and optimization tool that checks whether ChatGPT, Perplexity, Claude and Google AI can find, understand and recommend your product.

  Developer productivity free tierAPIMCP

• nohumans.directory

  A machine-readable registry of paid x402 APIs and datasets, verified by paying endpoints with real USDC and publishing purchase outcomes.

  APIs & backend free tierAPIMCP

• 402post

  Paid classified listings for AI agents, posted over HTTP or MCP and paid with x402 in USDC on Base.

  Other free tierAPIMCP

• 402cron

  Scheduled webhook delivery for AI agents, paid per run in USDC on Base via x402

  APIs & backend APIMCP

• minia2a.uk

  Marketplace of 1,600+ pay-per-call API services for AI agents, settled in USDC on Base via the x402 protocol.

  APIs & backend free tierAPIMCP

• PayAPI Market

  x402 marketplace for AI agents

  APIs & backend free tierAPIMCPSDK

• OnPage.dev

  Free SEO and AI-visibility scanner for a page or a whole site, also usable as an MCP server in AI agents.

  Developer productivity free tierAPIMCP

Side by side

Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.

curl https://toolgrep.com/api/products/402registry/alternatives