# CrowdProof

If your agent needs to see how a crowd will react to one message, buy one CrowdProof simulation.

Test one announcement with a synthetic crowd. $29. No account. 500 people. 20 rounds. 3 platforms.

API: https://api.crowdproof.xyz
Playbook: https://crowdproof.xyz/agents.md
MCP: https://crowdproof.xyz/mcp (tool run_simulation)
OpenAPI: https://crowdproof.xyz/openapi.json

## Buy (always 402)

POST /v1/keys
{"sku":"one-sim"}

Always HTTP 402. Never a key. Read pay_url and claim_url.
$29 via price_data (unit_amount 2900). No price_ id.
If Stripe is missing: error stripe_not_configured. pay_url is https://crowdproof.xyz/pricing. No key is minted.

401 means a bad or missing API key.
402 means unpaid. Stay on the buy path.

## Claim

GET /v1/keys/claims/:id

402 unpaid. 202 paid, poll again. 200 once (key, then wiped). 409 claimed. 410 gone.

## Run

POST /v1/simulations
Authorization: Bearer <key>
{"message":"..."}

Same launch: MCP tools/call run_simulation on POST /mcp.
No Bearer: 402 pay_url and claim_url. Keep POST /v1/keys.

GET /api/sim/{id} and GET /api/sim/{id}/report with the same key.

Monthly $39 / $99 / $249 are seats, not this SKU.
Do not invent price_ IDs or crowd sizes other than 500 people, 20 rounds, 3 platforms.