The AI Agent API Reliability Stack, September 2026
A market map of the tools that help AI agents understand, call, test and monitor APIs reliably: 44 products across Understand, Build, Verify and Run.
manifest.build Blog4 min read
Manifest
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Best oasdiff Alternatives in 2026
The best oasdiff alternatives in 2026, for API vendors and API consumers: what each tool watches, what it produces and what it costs.
manifest.build Blog8 min readManifest gateway now has a CLI and a remote MCP server
Run every Manifest gateway task from the terminal with mnfst, or connect Claude, Cursor, Codex, and other MCP clients over OAuth, without opening the dashboard.
manifest.build Blog3 min readManifest is now available as an n8n community node
Install n8n-nodes-manifest to use Manifest as the chat model behind n8n AI Agents, or call Chat Completions and Responses directly from a workflow, on Manifest Cloud or self-hosted.
manifest.build Blog3 min readManifest is taking a new direction
Manifest is becoming an autofix solution for APIs in general: it reads the error, corrects the request and retries it in less than a second.
manifest.build Blog2 min readEveryone is building LLM routers, we deprecated ours
We don't believe in model routing anymore. For most use cases, sticking to a single battle-tested model is the best thing you can do.
manifest.build Blog3 min readRequest logs are back
Request logs are back, opt-in at the agent level. See the full payload on every provider call, including messages, tool usage, and raw JSON.
manifest.build Blog2 min readYour failing requests now fix themselves
Autofix is live on Manifest Cloud. When a provider rejects a request with a fixable error, Manifest patches it and sends it again. Here's what shipped.
manifest.build Blog2 min readThe Biggest Reliability Problem in AI Isn't Hallucinations Anymore
In production, the biggest AI problem isn't what the model says. It's whether users get an answer at all. Datadog's 2026 report puts LLM failure at 5%, and 60% of it is rate limits. Reliability is the next competitive advantage.
manifest.build Blog3 min readIntroducing paid plans for Manifest Cloud
Manifest Cloud now has a Pro plan at $19/month. The Free plan stays free with all features included. Here is what changes and what stays the same.
manifest.build Blog3 min readThe reliability stack for LLM agents: tools and methods
A request can fail before you send it, while it runs, or after it returns. This is a directory of tools and methods grouped by what each one does.
manifest.build Blog3 min readThis will get you banned from your ChatGPT subscription
A ChatGPT subscription is cheap inference, but strictly personal. Sharing, automating, serving other users, or reselling access can get you banned.
manifest.build Blog2 min readChatGPT Plus: Enjoy $200 of Tokens for $20 While It Lasts
OpenAI lets you spend your $20 ChatGPT Plus subscription inside third-party harnesses like OpenCode and Pi — worth ~$200 in tokens. Here's why it may not last.
manifest.build Blog3 min readThe errors that actually break LLM agents in production
Your agent ran clean in the demo. Friday it returns 400s. Here are the six plumbing failures we see most in Manifest's logs.
manifest.build Blog4 min readI Stopped Prompting My Agent. Now I Design the Loop That Prompts It.
How a Python script, four files, and a strict eval turned a personal AI agent from something I operated into something I supervise.
manifest.build Blog5 min readWe are deprecating our rule-based routing
Manifest is deprecating rule-based complexity and specificity routing on September 1, 2026. Why, and how to switch to the default or custom routing tiers.
manifest.build Blog3 min readAnnouncing modelparams.dev, the open-source model parameter database
modelparams.dev is a free, open-source database of parameters for popular AI models. Browse the UI, fetch the API, or get type-safe configs in TypeScript.
manifest.build Blog3 min readRun Claude Code on your ChatGPT Plus subscription
Use Manifest to route Claude Code requests through your existing ChatGPT Plus subscription instead of paying for API keys on top.
manifest.build Blog3 min read
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