Compare

Bump vs Fern

Bump scores higher on the AgentReady, 52/100 against 34/100. They differ on 10 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Bump. Bump.sh is a platform for API documentation and MCP (Model Context Protocol) servers that automatically generates docs and production-ready MCP servers from OpenAPI, AsyncAPI, and Arazzo specifications.

Fern. Fern is a documentation platform that automatically generates and hosts production-ready Model Context Protocol (MCP) servers for documentation sites, enabling AI clients like Claude Code, Cursor, and Windsurf to connect to documentation as an external data source.

Where Bump is ahead

Bump passes clear product positioning, public docs discoverable and machine-readable metadata, and Fern does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: structured api reference. Fern misses it.

And on adopt, copyable quickstart. Fern misses it.

Finally, on operate, canonical workflow succeeds, retry behavior documented and observable execution. Fern misses those.

Where Fern is ahead

Fern passes llms.txt published, and Bump does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds operate: agent compatibility verified. Bump misses it.

What neither does

Both fail clear canonical domain, llms-full.txt / full agent docs, openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover is whether an agent can find the product at all without being told it exists. Bump leads 80 to 53. Bump misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs; Fern misses clear canonical domain, clear product positioning, public docs discoverable, llms-full.txt / full agent docs, machine-readable metadata.

Understand. Bump leads 38 to 23. Bump misses openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Fern misses structured api reference, openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Bump leads 45 to 40. Bump misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request; Fern misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart.

Operate. Bump leads 44 to 18. Bump misses structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable, agent compatibility verified; Fern misses canonical workflow succeeds, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution.

Pricing

Bump does not publish a machine-readable starting price. Fern does not publish one.

Signal by signal

Which to pick

Bump clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Bump and Fern. Alternatives to each: Bump, Fern.

An agent can fetch this as data: POST /v1/compare {"slugs": ["bump", "fern"]}