toolgrep / Search / Agentropolis
Alternatives to Agentropolis
Agentropolis: Search engine for agent tools: MCP servers, x402/MPP paid APIs, A2A agents and kits with payment-verified trust. 8 products similar to Agentropolis, 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.
- AgentBIT
Pay-per-call API tools for AI agents, monetized with the x402 protocol
- agentsvc.io
Pay-per-call API marketplace for AI agents with 127 services settled in USDC via x402
- PayAPI Market
x402 marketplace for AI agents
- Agent Nexus
A machine-readable registry of APIs, MCP servers and CLIs that AI agents call, with live health checks and reliability scores.
- minia2a.uk
Marketplace of 1,600+ pay-per-call API services for AI agents, settled in USDC on Base via the x402 protocol.
- ToolRouter
The OpenRouter for tools — one MCP connection to 414 hosted tools, pay per call
- ISHOB
Intelligent Service Hub for Autonomous Bots
- Fatstack
Pay-per-call tools for AI agents
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Agentropolis | Free | yes | yes | yes | yes | — |
| AgentBIT | Usage-based | yes | yes | yes | no | — |
| agentsvc.io | Usage-based · from $0.002 per call | yes | yes | yes | no | — |
| PayAPI Market | Free | yes | yes | yes | yes | — |
| Agent Nexus | Freemium · from $0 | yes | yes | yes | no | — |
| minia2a.uk | Usage-based | yes | yes | yes | no | — |
| ToolRouter | Usage-based · from $0.01 per paid tool call; Lite $9/mo; Plus $19/mo; Team $29/seat/mo; Business $59/seat/mo | yes | yes | yes | yes | no |
| ISHOB | Usage-based · from $0.0001 per call | yes | yes | yes | — | — |
| Fatstack | Usage-based · from $0.0005 per call | — | 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.
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