Changelog

Keep track of changes and upgrades to the Thumbtack API.

2026.MAY.26

[createRequestV4] The elements in the returned request.contactedBusinesses list now contain the corresponding negotiationID for each Business contacted.

2026.MAY.11

[Negotiations] Negotiation payloads returned by Get Negotiation by ID and the webhook event NegotiationCreatedV4 now contain a new field called leadPriceBreakdown which contain the subtotal and, if applicable, salesTax.
Note: salesTax is only collected for leads in a small subset of states and cities. The leadPriceBreakdown is optional and will only be present when the lead cost has been calculated.

2026.FEB.09

[createRequestV4] Fixed a bug where phoneNumber fields were not populated in the request.contactedBusinesses list.

2026.JAN.16

[General] Error responses (4XX/5XX) of the form ProblemDetails now include a traceID field, such as:

{
  "type": "https://api.thumbtack.com/problems/validation-error",
  "title": "Your request is not valid.",
  "status": 400,
  "traceID": "feca66787a0a9ee8",
  "errors": [...]
}

Last Updated: May 27th, 2026

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