Skip to content
FieldFlow logo

FieldFlow

Turns any REST API described by an OpenAPI spec into a FastAPI proxy whose endpoints return only the requested fields.

Actively maintained

At a glanceswept Oct 18, 2026

47 linking domains

Emerging

For
Teams with a REST API who want LLM agents to fetch only the fields they need.
Activity
Actively maintainedrelease 9 months ago
Runs as
API
App Store
51 ratingsiPhone & iPad · updated Jan 30, 2026
Used for
  • generate field-filtered endpoints from an OpenAPI specification
  • expose filtered API routes to MCP clients like Claude Desktop
  • proxy REST requests through a FastAPI gateway that returns trimmed responses
Worth knowingcomputed from what we read · each with its source
  • Launched on Product Hunt on Apr 24, 2026Product Hunt ↗
Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

Compare FieldFlow with

Pick up to two.

All 10 alternatives to FieldFlow →

All Developer tools tools →

Not it? Say what you need

beta

Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

No notes yet. What do you use FieldFlow for?

Sign in to leave a note
Questions this page answers
  • What is FieldFlow?

    Turns any REST API described by an OpenAPI spec into a FastAPI proxy whose endpoints return only the requested fields. It is listed in the Atlas under Developer tools.

  • Who is FieldFlow for?

    Teams with a REST API who want LLM agents to fetch only the fields they need.

  • Do people use FieldFlow?

    Emerging.

  • Is FieldFlow still maintained?

    Actively maintained: release 9 months ago.

  • Does FieldFlow have an iPhone app?

    Yes: “FieldFlow Mobile” on the App Store, rated 5 from 1 ratings; current version released 2026-01-30.

  • What are alternatives to FieldFlow?

    In Developer tools, by use: NinjaChat, Twitterapi, Respan, Higress MCP Marketplace, CCAPI, Experiential Labs.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk