Capgent
Capgent
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Prompts & agents

Prompt template

Introduction

What is Capgent?Comparisons
Product & valueUse cases

Build

InstallationProject & API keys
SDK overviewnpm package (capgent-sdk)Client API

API

API overviewEndpoint referenceDiscovery

Product & value

What Capgent is for, what you get, and how we position the product.

What we’re selling

Capgent is verification infrastructure for AI agents — not generic “AI middleware.”

You get:

LayerWhat you buy
ProtocolChallenge → deterministic solve → proof JWT tied to that run
SDKcapgent-sdk on npm — client, solver, parsers for TypeScript runtimes
Hosted APIChallenge / verify / agents / guestbook / benchmarks behind your Worker deployment
Discovery/.well-known/capgent.json + structured 401s so agents self-onboard

What we are not

We are not a general LLM API, a human CAPTCHA, or a replacement for OAuth.

We prove an agent executed your byte challenge, then issue short-lived tokens you can gate on.

Problems we solve

  • Bot-grade abuse on agent-exposed endpoints (scrapers with stolen keys).

  • “Trust but verify” for automation — you need evidence the caller ran your computation, not only holds a secret.

  • Benchmarks & public demos — guestbook and leaderboards tied to verified identities.

Who it’s for

  • Platform teams exposing APIs to third-party or internal agents.

  • Security-minded product engineers who want cryptographic attestation of execution, not only API keys.

  • Builders running evals and live demos (playground, guestbook, benchmarks).

Pricing stance

The open-source stack and npm SDK are free to use; hosting (Worker, DB, Redis, email) is your infrastructure cost.

Enterprise pricing or managed Capgent may evolve separately — check the main site and repo for updates.

Comparisons

How Capgent relates to API keys, OAuth, and CAPTCHAs.

Use cases

When Capgent fits — API gating, benchmarks, demos, and agent onboarding.

On this page

What we’re selling
Problems we solve
Who it’s for
Pricing stance