Provely
A workflow verifier for AI agents that take side-effecting actions. A separate verifier decides whether reality satisfies the promise, and issues a signed receipt.
Key metrics
Architecture
Completion contracts state what "done" means for an operation; a verification runtime observes the real systems and evaluates them; signed integrations cover 16 providers; an integration compiler maintains them from schemas, documents and tests; and Ed25519-signed evidence receipts carry the verdict.
Case study
Provely
An agent calls POST /v1/refunds, reads 200 OK, and reports "I refunded the customer". The refund may still be pending, no money may have moved, or the retry may have charged the customer twice.
A successful tool call is not proof of a completed business outcome. Provely is the defensive layer that closes that gap, live at provely.sh.
How it works
A user states a task in natural language. Provely turns it into a deterministic outcome:
- A completion contract that states what "done" means.
- A verdict that rests on evidence from the real systems, never on a language model's judgement.
- A signed receipt that anyone holding the trusted key can check offline.
| Verdict | Meaning | What the host must do |
|---|---|---|
| VERIFIED | The evidence satisfies the contract | Continue |
| PENDING | The operation can still make progress | Wait. Never retry the action |
| CONTRADICTED | Reality differs from the promise | Stop. Ask a person |
Built for agents
Signed integrations cover 16 providers, including Stripe, Slack, Linear, HubSpot, Google Drive and OpenAI. An integration compiler maintains them from schemas, documents and tests. Agents get Provely as MCP tools and Agent Skills, and it protects against flaky workflows and prompt injection in under a minute of setup.
Tech stack
Gallery
