COLVO

Test your refund agent before it touches real money

COLVO runs your AI agent against a simulated Stripe, Paddle or Chargebee and checks every refund, cancellation and plan change against what really happened. Get product news and tips.

  • A copy of billing, not the real thingYour agent works on a simulated account, so a bad refund costs nothing.
  • Pass or fail decided by factsChecks compare the final billing state, not what the agent says it did.
  • Run it on every changeCatch a new prompt or model that starts refunding twice.

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Tests & guards AI agents onStripePaddleChargebee· the agent never holds your payment keys· EU-hosted · GDPR
How it works

From your agent to a verdict in three steps

1

Connect the agent

Any HTTP endpoint, n8n, Flowise, Voiceflow, Botpress or an OpenAI prompt. Give it one tool to propose refunds and cancellations to COLVO.

2

Run the scenarios

Each attempt gets a fresh simulated Stripe, Paddle or Chargebee account, a customer message and faults like timeouts or lost responses.

3

Read the verdict

PASS or FAIL comes from the final billing state, checked without AI. The report puts what the agent said next to what really happened.

See it in action

A run that caught a double refund

Five scenarios against a simulated Stripe. Four pass. One fails, and the report shows exactly why.

  • Expected 1 refund, observed 2: the failure is in the billing state, not in the wording
  • Every scenario runs more than once, so a lucky pass can’t hide a flaky agent
  • Re-run the suite from CI on every prompt or model change
What it catches

What a run catches before your customers do

Every check reads the final state of the simulated account. The agent’s reply is compared with it, never trusted on its own.

FAIL01
Refunds twice after a lost response→ expected 1 refund, observed 2
FAIL02
Says “refunded” when no refund exists→ the reply disagrees with the state
FAIL03
Cancels now when the customer asked for the period end→ access ended too early
FAIL04
Treats “I might cancel” as a cancellation→ nothing should have changed
DENY05
Tries to refund another customer’s payment→ denied by the mandate, flagged in the report
REVIEW06
Upgrades a plan that charges today without approval→ above the auto-allow line → a person decides
Without / with

Shipping a refund agent, with and without tests

Without COLVO

  • You hear about the double refund from the customer.
  • A new prompt or model goes live because it looked fine in a chat.
  • “It worked when I tried it” is the whole test.

With COLVO

  • Retries, timeouts and wrong customers are tried in a simulated account first.
  • Every change re-runs the suite before it ships.
  • PASS means the billing state was right on every attempt.
FAQ

Before you sign up

Short answers about how the tests work.

Does a test touch our real Stripe account?

No. Tests run against a simulated Stripe, Paddle, Chargebee, Shopify or Recharge account, a fresh one for every attempt. Nothing reaches your real billing.

Which agents can we connect?

Any HTTP endpoint, plus ready-made setups for n8n, Flowise, Voiceflow, Botpress and OpenAI prompts. See integrations.

Is the verdict decided by AI?

No. PASS or FAIL comes from deterministic checks on the final billing state. An optional AI review of the reply is advisory and can never turn a FAIL into a PASS.

Can we run it in CI?

Yes. A small CLI and a GitHub Action start a run and fail the build when the run fails. See CLI & CI gate.

Is there a free plan?

Yes. The Free plan includes 100 test runs a month. Accounts are invite-only for now: request one on the early access page. Plans and prices: pricing.

Find the double refund before a customer does.

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Stripe · Paddle · Chargebee· the agent never holds your payment keys· EU-hosted · GDPR