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Developer Tools
Open-source visual programming environment for building and debugging AI agent workflows.
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Manifest
Open-source LLM gateway for reliable AI agent requests
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About Manifest
Manifest is an open-source LLM gateway that routes agent requests between subscription plans, bring-your-own-key providers, and local models. Its Autofix feature repairs malformed API requests on the fly, while model fallbacks, full request logs, and cost visualization keep production agents running reliably. Teams can self-host the whole router with Docker for free or use the hosted cloud version. It suits builders and startups managing inference across multiple model providers.
Manifest website preview
Live preview of manifest.build via the WordPress mShots service — it can take a few seconds to generate on a first visit.
Manifest: strengths & things to check
Strengths
- Completely free to use — this directory lists no paid plan for it.
- Covers llm gateway, ai agents, open source, routing — see the focus areas listed in its key facts.
- Has 6 close alternatives in the same category on this page, so switching or comparing is easy.
Things to check
- Free tools can change their model or shut down — avoid locking critical work into it without an export path.
- Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
- It is one of 1164 tools in the Developer Tools category here — compare it against the alternatives below before you commit.
Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.
Manifest pricing
| Pricing model | Free — listed in this directory as a free tool, with no paid plan required to use it. |
|---|---|
| Free access | Yes — fully free |
| Current plan prices | Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale. |
| Official site | manifest.build |
Manifest key facts
- Category: Developer Tools
- Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
- Focus areas: llm gateway, ai agents, open source, routing
- Official site: manifest.build
Manifest FAQ
How much does Manifest cost?
Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (manifest.build).
What is Manifest used for?
Open-source LLM gateway for reliable AI agent requests Its focus areas in the Developer Tools category: llm gateway, ai agents, open source, routing.
Where can I try Manifest?
On its official site, manifest.build — the Visit Official Site button above goes straight there.
Manifest vs alternatives
| Manifest | Rivet | Agentprobe | Ansible | |
|---|---|---|---|---|
| Pricing | Free — listed in this directory as a free tool, with no paid plan required to use it. | Free — listed in this directory as a free tool, with no paid plan required to use it. | Free — listed in this directory as a free tool, with no paid plan required to use it. | Freemium — a free tier lets you start, and paid plans are available if you need more. |
| Focus areas | llm gateway, ai agents, open source, routing | open source, ai agents, visual programming, typescript, framework | ai agents, ecommerce, audit | automation, configuration management, devops, open source |
| Official site | manifest.build | rivet.ironcladapp.com | agentprobe.fly.dev | ansible.com |
| Directory status | Listed | Listed | Listed | Listed |
Side-by-side from each listing's own directory data. Full alternative cards are below.
About the Developer Tools category
Editors, platforms, and services developers rely on to build and ship software. The Developer Tools category on Tools Hub currently lists 1164 tools. Alongside Manifest, it includes MCP Registry, Run This LLM, DeepSeek Platform, DigitalOcean.
Alternatives to Manifest
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