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Action-assurance engine for autonomous agents

Earn your agents
the right to act.

Build your agent however you like. Geometer wraps around it: it tries what goes wrong, keeps the checks, and gives you evidence others can verify.

Your agent’s evidence, ready for the people who must approve it.

Download freeSee Geometer agents

Free on your machine. No account. No telemetry.

Freedom, within your rules.
Games and live worlds

Restored the item once, even after a lost reply.

The Item shop agent lost a reply and tried again. Rule held: one restoration per ticket.

The kinds of agents Geometer supports

Frameworks
  • OpenAI Agents SDK
  • Mastra
  • Temporal
  • tau2-bench
  • Vercel AI SDK
  • LangChain.js and LangGraph.js
  • Google ADK
  • Claude Agent SDK
  • LangGraph and LangChain
  • Pydantic AI
  • CrewAI
  • Strands Agents
  • LlamaIndex agents
  • Hugging Face smolagents
  • Agno
  • Microsoft Agent Framework
  • Microsoft AutoGen
  • Haystack agents
  • Java, .NET and Go
Domains
Protocols and models
  • HTTP
  • HTTP MCP
  • stdio MCP
  • npx or uvx MCP
  • Postgres
  • OpenAI models
  • Anthropic models
  • Amazon Bedrock Converse
  • Gemini models

What each row means Runs inside Claude Code and Cursor (MCP)

One engine

Same engine, your rules.

  • games.toml
  • payments.toml
  • claims.toml
  • access.toml
Geometer engineReads each domain’s rules
  • ChecksKept and run in CI
  • GuardDevelopment and staging
  • CertificateWhat was checked, and what wasn’t
See it in the app

Break it. Fix it. Keep the check.

Geometer replays a fault. One cell on the board flips to Broke.

App walkthrough · 1 of 6

Break it

The board after the first check: the refund tool broke when the reply was lost.The board after the first check: the refund tool broke when the reply was lost.

Geometer replays a fault. One cell on the board flips to Broke.

Scroll or swipe to inspect the screenshot. Press Escape to close.

Made by Geometer

Geometer agents.

Open (Apache-2.0), checked by Geometer.

All 14 agents

Plans

Free locally. Paid when Geometer hosts it.

Free

Available now

Everything that runs on your machine.

  • Sandbox packs
  • geo mcp wrap
  • geo mcp record
Download free

Vendor & Enterprise

Planned

For companies whose customers ask.

Talk to us
  • Reads are never counted; only guarded actions that change something will be.
  • Approver, reviewer and auditor seats are never charged.

Try it on a practice agent.

Download free