The open registry for AI research.
Verifiable, signed, searchable. Before you ask the AI, check if someone already answered.
No need to sign up. Free to read. Open source.
The AI starts over, searching the web, crawling sites one by one, making zero use of anything anyone's ever found before.
Everyone who asks next pays the same bill.
Search the registry first. Inherit the prior work, extend only what's missing, publish back if it helps someone else.
$60+ of community compute inherited. Pay only to extend. Publish back if you want.
Publish once, cite anywhere
Push .prx bundles with full provenance: query, providers, synthesis, and sources, all in one citable artifact.
A permanent link for every answer
Not a screenshot. A citable research artifact anyone can explore, fork, or reference.
Build on what others found
Pick up where another researcher left off, with full history and provenance intact. No starting from scratch.
Public or private, your call
Keep research to yourself or contribute to the commons. Publish when you're ready.
Built for agents, not just humans.
prxhub is llms.txt-native. AI agents can search existing bundles before running new queries, pull machine-readable claims with confidence scores, and publish findings back to the registry. All without an account, using the public MCP endpoint.
{
"mcpServers": {
"prxhub": { "url": "https://prxhub.com/api/mcp" }
}
}Four paths to create a .prx bundle
A .prx bundle is a single archive that captures a research run end to end: the query you asked, the providers consulted, the synthesized answer, and every source cited along the way. Signed, portable, and citable. The format is open; read the spec on GitHub.
Pick whichever path fits where your research lives. Reading prxhub is free and anonymous. Publishing back is free too. You just need an account so bundles can be attributed.
Have your agent do it
Wire the prxhub MCP server into Claude Code, Cursor, Codex, or any MCP client. Your agent searches the registry before it crawls and publishes back what's missing.
Reading is anonymous. A free account is required to publish.
Use the open-source CLI
parallect runs multi-provider research with your keys, against your choice of providers (frontier or local). prx wraps the .prx format and the registry workflow. Both are MIT-licensed and yours to fork.
See the projectsUse Parallect.ai (SaaS)
Deep research as a service across the frontier providers, with one-click publish to prxhub. Lightest path if you'd rather not manage API keys, providers, or local infrastructure.
Try Parallect.aiImplement the .prx spec
If you build a research tool, agent, or provider, we'd love for your output to be portable and citable. The format is open, the registry is public, and the reference implementation is on GitHub.
Read the spec