toolgrep / AI agents & frameworks / crosscheck
Alternatives to crosscheck
crosscheck: Independent checks for AI agents, paid per call in USDC over x402. 8 products similar to crosscheck, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 7 of 8 offer an MCP server.
- agentsvc.io
Pay-per-call API marketplace for AI agents with 127 services settled in USDC via x402
- 1cent
Pay-per-call web intelligence for AI agents
- fitze-x402-seller
Pay-per-call x402 API tools priced in USDC on Base mainnet
- AISkills402
Marketplace of tested SKILL.md files that AI agents buy once over x402, paid in USDC on Base
- Lumière PayCheck
Trust scores for x402 payment endpoints, checked before an AI agent pays
- x402 Preflight
Launch diagnostics for x402 API developers
- 402registry
Pay-per-check discoverability audit that shows what an AI crawler actually sees on your site
- PayAPI Market
x402 marketplace for AI agents
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| crosscheck | Usage-based · from $0.005 | yes | yes | no | no | — |
| agentsvc.io | Usage-based · from $0.002 per call | yes | yes | yes | no | — |
| 1cent | Usage-based | yes | yes | yes | yes | — |
| fitze-x402-seller | Usage-based | yes | yes | no | no | — |
| AISkills402 | Usage-based · from $0.01 one-time per skill; pay-per-call APIs from $0.003 | yes | yes | yes | no | no |
| Lumière PayCheck | Freemium | yes | yes | yes | yes | — |
| x402 Preflight | Freemium | yes | yes | yes | no | no |
| 402registry | Usage-based | yes | yes | yes | no | no |
| PayAPI Market | Free | yes | yes | yes | yes | — |
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.
API
curl https://toolgrep.com/api/products/crosscheck/alternatives