Let a person correct AI output before the agent continues.

The agent creates a review with its proposed result. Fangst returns a hosted link. A person checks the uncertain fields, and the corrected structure returns to the agent.

Contact See the API example

From API call to structured result.

Send the proposed dataSoftware or an AI agent creates a review with values already filled in.
Let a person check itThe reviewer confirms correct fields and changes anything that is wrong.
Read the corrected resultFangst returns the reviewed structure through the API or a webhook.

Review only the fields that need a person.

An extraction agent can include confidence by field and ask for a review before writing the final values to another system.

Create

POST https://api.fang.st/v1/reviews
Authorization: Bearer <FANGST_API_TOKEN>
Content-Type: application/json

{
  "title": "Check extracted values",
  "initial_values": {
    "organization_number": "92345678",
    "account": "1503.44.78129"
  },
  "editable_fields": [
    "organization_number",
    "account"
  ]
}

Completed result

{
  "status": "completed",
  "corrected": {
    "invoice_total": 12450,
    "currency": "NOK"
  }
}

Use REST, MCP, polling, or webhooks.

Software uses the HTTP resources directly. Authorized AI agents can use the same API or intention-oriented Fangst MCP tools.

POST/v1/reviewsCreate a hosted review with initial values.

GET/v1/reviews/:idRead corrected values and review status.

MCPrequest_human_reviewAsk a person to check generated or extracted data.

MCPget_human_reviewRead the confirmed or corrected result.

Fangst runs the hosted interaction.

Hosted page

Responsive pages, clear sender context, validation, private or shared links, expiry, and submission limits.

Structured result

Typed values, authenticated file downloads, correlation metadata, timestamps, and stable response ids.

Reliable delivery

Polling, signed webhooks, retries with backoff, delivery history, idempotency, and replay.

Pay for completed interactions. No subscription.

Start with $1 free. Add funds from $10. Links, polling, webhooks, and abandoned requests do not use the main billable unit.

See pricing

Give your software a way to ask people.

Create the hosted interaction through Fangst and receive the structured result back.

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