toolgrep / Other / NAIF Gravity
Alternatives to NAIF Gravity
NAIF Gravity: Bounded diagnostics and repair services for MCP servers, APIs, webhooks and AI agents. 8 products similar to NAIF Gravity, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 7 of 8 have an API, 8 of 8 offer an MCP server, 1 of 8 is open source.
- Agent Nexus
A machine-readable registry of APIs, MCP servers and CLIs that AI agents call, with live health checks and reliability scores.
- Verifi
Human judgment for AI agents
- CodeRifts
Contract-change authorization for AI agents: fail-closed authorization-execution gate with offline-verifiable receipts
- Package Intel
Keyless MCP server for vetting npm, PyPI and crates dependencies
- Ceraph
Agentic Testing for React Native & Expo
- MCP Charts
The MCP for MCPs
- Bifrost
Open-source AI gateway for LLMs, MCP, and agents
- AgentIndex
Directory of open-source AI agents, MCP servers, agent frameworks and Cursor rules, updated daily
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| NAIF Gravity | Usage-based · from $19 | yes | yes | yes | no | no |
| Agent Nexus | Freemium · from $0 | yes | yes | yes | no | — |
| Verifi | Usage-based · from 0.10 EUR admission + 2.90 EUR (60 min) or 1.45 EUR (24 h) unlock per review | yes | yes | yes | no | no |
| CodeRifts | Freemium | yes | yes | yes | yes | — |
| Package Intel | Freemium · from $0 | yes | yes | yes | no | — |
| Ceraph | Freemium | yes | no | yes | no | no |
| MCP Charts | Free | yes | yes | yes | — | — |
| Bifrost | Freemium | yes | yes | yes | yes | yes |
| AgentIndex | Free | yes | yes | yes | no | — |
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
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