Disclosure: I’m with Rezolve.ai, the team behind Clocked. We’re inviting developers to build a new working AI app in the Clocked Build Challenge, October 21–November 10, 2026.
Clocked is an API for applications that need structured decisions and exact evidence rather than a generated answer. It returns typed decisions with probabilities, verbatim extractions with source positions, and filled records. Other endpoints cover PII protection, injection/script inspection, grounding verification, comparison and reranking.
The challenge is to build a new app during the three-week window that meaningfully integrates at least one Clocked endpoint. Any stack; solo builders and teams welcome. A document triage tool, a source-grounded extraction workflow, or a review app that escalates uncertain decisions are possible directions.
There are five awards: $600 Best Overall App; $400 each for best use of Decide/Extract/Fill, Protect/Guard/Inspect, and Verify/Compare/Rerank; and $200 People’s Choice. Total: $2,000.
Free entry. New accounts include 4,000 credits; CLOCKEDHACKATHON adds 16,000 more, for 20,000 total.
Entries close November 10 at 11:59 p.m. Eastern Time. Judging and voting run November 11–17; winners November 18. Participants must be 18+ and of legal age where they live; location and other restrictions apply.
Challenge and project entry: Clocked Build Challenge: build something intelligent — Clocked by rezolve.ai
API documentation: Introduction — Clocked documentation I’m happy to answer questions about the endpoints, eligibility or scoping a project.