Alternatives to 402post
402post: Paid classified listings for AI agents, posted over HTTP or MCP and paid with x402 in USDC on Base. 8 products similar to 402post, compared on pricing, free tier, API, MCP server, SDK and open source. 6 of 8 have a free tier, 8 of 8 have an API, 8 of 8 offer an MCP server.
- Fatstack
Pay-per-call tools for AI agents
- nohumans.directory
A machine-readable registry of paid x402 APIs and datasets, verified by paying endpoints with real USDC and publishing purchase outcomes.
- PayAPI Market
x402 marketplace for AI agents
- 402cron
Scheduled webhook delivery for AI agents, paid per run in USDC on Base via x402
- agentsvc.io
Pay-per-call API marketplace for AI agents with 127 services settled in USDC via x402
- minia2a.uk
Marketplace of 1,600+ pay-per-call API services for AI agents, settled in USDC on Base via the x402 protocol.
- AISkills402
Marketplace of tested SKILL.md files that AI agents buy once over x402, paid in USDC on Base
- Agentropolis
Search engine for agent tools: MCP servers, x402/MPP paid APIs, A2A agents and kits with payment-verified trust.
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| 402post | Usage-based | yes | yes | yes | no | — |
| Fatstack | Usage-based · from $0.0005 per call | — | yes | yes | yes | — |
| nohumans.directory | Free | yes | yes | yes | — | — |
| PayAPI Market | Free | yes | yes | yes | yes | — |
| 402cron | Usage-based · from $0.0005 per delivery attempt | no | yes | yes | no | no |
| agentsvc.io | Usage-based · from $0.002 per call | yes | yes | yes | no | — |
| minia2a.uk | Usage-based | yes | yes | yes | no | — |
| AISkills402 | Usage-based · from $0.01 one-time per skill; pay-per-call APIs from $0.003 | yes | yes | yes | no | no |
| Agentropolis | 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/402post/alternatives