Redocly is a company that specializes in API documentation and governance tooling. Their platform helps organizations create, manage, and publish API documentation through Realm (the integrated lifecycle platform that unifies Redoc, Revel, and Reef), Reunite (Git-connected collaboration and deployment for docs/APIs), Revel (developer portal), Reef (internal API catalog and scorecard), and Redoc (open-source OpenAPI renderer). The Redocly CLI provides linting, bundling, splitting, decoration, and documentation generation for OpenAPI, AsyncAPI, and Arazzo specifications. Respect Monitoring adds continuous, Arazzo-powered API monitoring, and the Enterprise tier exposes MCP Servers and AI search for Realm portals — positioning Redocly's catalog as an AI substrate for agentic software.
Redocly publishes 16 APIs on the APIs.io network, including Health API, Metadata API, Remotes API, and 13 more. Tagged areas include Artificial Intelligence, API Catalog, API Documentation, Arazzo, and Developer Portal.
The Redocly catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.
Redocly’s developer surface includes authentication, documentation, developer portal, pricing, engineering blog, CLI, support, and 57 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it
carries 10 points of the composite. It is scored from the published contracts
themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already
holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in
front of it, and the first time that check is skipped a duplicate record is created.
Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet,
not penalised by it.
The six quality facets above are damped to 75 points between them,
because the conditional facet above carries the other
25. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 75% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/redocly: open an issue to ask a question, or submit a pull request to add artifacts.
Submit an artifact on GitHub — free →Manage your own listing — the Influence plan, $499/mo →
Redocly is an area vendor: providers adopt it to run part of their developer surface. This is the Kin Score checks its features can move for a provider that adopts it, what each one really earns, and what it earns nothing for.
documentationdeveloper portalmeasured14 features checked 2026-09-25 · rubric v0.22.0
Redocly’s lift has two halves. Realm, the hosted portal, ships llms.txt, a docs MCP server (graded platform), Replay try-it, a mock server, and it publishes Agent Skills the provider writes, with an A2A agent card generated over them, so those two earn full credit if the provider actually writes the skills. Redocly CLI is the only tool in this documentation set that reaches Contract Quality and Governance: its recommended ruleset flags missing summaries, operationIds, 2xx/4xx responses and empty servers, and a published ruleset earns rules_present. Neither half changes a score on its own; the provider has to fix what the linter flags, write the skills and publish the ruleset.
Agent Readiness17.8 of 139 pts
Contract Governance12.5 of 33 pts
Contract Quality27.0 of 211 pts
Developer Ergonomics17.0 of 42 pts
Discoverability4.0 of 54 pts
Check
Earns
Through
A2A Agent Card Agent Readiness · customers -3.1 pts vs controlRedocly’s own card carries capabilities, protocolVersion 0.3.0, skills and the transport and mode fields, so the harvest grades it conformant. Its url points at an /a2a endpoint the card does not prove exists, which the grader does not test.
Agent Skills Agent Readiness · customers +0.8 pts vs controlProvider-written and served on the provider’s domain, so first-party; Realm is only the publisher.
Request/Response Examplespartial Agent Readiness · customers +22.2 pts vs controlThe dimension reads examples inside the OpenAPI first; snippets generated for the reference reach only the Examples / Code Samples link fallback.
Publishes a ruleset Contract Governance · customers -1.1 pts vs controlThe check is described in Spectral terms and most catalog rulesets are Spectral; a Redocly-format redocly.yaml may need to be published alongside or translated to be read.
Operations have summariessaturated Contract Quality · customers +1.9 pts vs control93% of providers with a contract, docs and a reference already earn this; the vendor cannot move it for most of its buyers.
Success responses definedsaturated Contract Quality · customers +0.3 pts vs control91% of providers with a contract, docs and a reference already earn this; the vendor cannot move it for most of its buyers.
Documentationsaturated Developer Ergonomics · customers +5.1 pts vs control95% of providers with a contract, docs and a reference already earn this; the vendor cannot move it for most of its buyers.
Publishes llms.txt Discoverability · customers +11.7 pts vs controlGenerated from the provider’s own portal content on the provider’s domain, so it reads as the provider’s (rule 2’s own-content, own-domain case).
Unique operationIdssaturated Contract Quality · customers +3.0 pts vs control92% of providers with a contract, docs and a reference already earn this; the vendor cannot move it for most of its buyers.
Error responses documented Contract Quality · customers +13.7 pts vs controlThe operation-4xx-response rule wants a 4xx response; the check also wants its schema, so a bare status code still falls short.
API referencesaturated Developer Ergonomics · customers +3.6 pts vs control94% of providers with a contract, docs and a reference already earn this; the vendor cannot move it for most of its buyers.
Substantial rulesetdiscounted Contract Governance · customers -2.4 pts vs controlExtending the recommended set gives the count only if the harvest resolves extends; a provider’s own short config alone rarely clears 20 rules, so half credit is the honest expectation.
Security applied to operationsconditional Contract Quality · customers -3.7 pts vs controlOnly if the API actually requires authentication; security-defined flags operations with no security, it cannot give an open API a scheme.
43 detected customers vs 5173 comparable providers: composite 49.6 vs 48.0, agent readiness 37.1 vs 32.5. Association, not cause.
Across 8977 providers that publish a contract, adopting Redocly would move 8976. Median lift: composite +9.4 (90th percentile +12.3), agent readiness +11.5 (+12.8). Conditional rows excluded.
What Redocly ships that earns nothing (3)
x-mcp OpenAPI extension — The extension documents an MCP server inside the OpenAPI; the dimension reads a deployed, probed server, not a description of one.
Docs MCP server — Realm serves an MCP server card and agent-skills index, not an api-catalog, security.txt or protected-resource document (redocly.com returns 404 for /.well-known/api-catalog).
Decorators — Decorators can inject examples the provider supplies; the tool writes none of its own.
A model, not a score. Adopting this vendor changes a provider's Kin Score only when the provider publishes the resulting artifacts on its own surface; nothing here writes a score, and no sponsorship or partnership can. The rating is not for sale → · Full vendor facets artifact
Redocly Realm is the comprehensive API lifecycle management platform that unifies Redoc, Revel, and Reef into a single integrated product. Realm includes API documentation, mock...
Redocly Reunite is the Git-connected collaboration and deployment surface for Realm. It prepares, deploys, and hosts documentation projects and mock servers and ships a content ...
Redocly Revel is the external developer hub product. It renders Markdown, Markdoc, and React pages with multi-product and localization capabilities, enabling organizations to cr...
Redocly Reef is the internal API platform — a service catalog and governance product that organizes, aids discovery, and monitors APIs throughout their lifecycle. Reef includes ...
Redoc is the open-source engine that renders API reference documentation from OpenAPI definitions with a three-panel layout known for clarity and usability. Supports OpenAPI 3.2...
Redocly CLI is an open-source command-line tool for working with OpenAPI descriptions, developer portals, and other API lifecycle operations. Supports linting, validation, bundl...
Respect Monitoring is Redocly's continuous, API-aware monitoring product powered by OpenAPI Arazzo workflows. Rather than uptime checking, it validates that API responses confor...
Arazzo is the OpenAPI Initiative's specification for describing multi-step API workflows; Redocly is a primary tooling vendor with first-class Arazzo support across Redocly CLI ...
Redocly ships a Docs MCP server as a Realm feature and runs it on its own documentation site. The endpoint answers anonymously: tools/list returns two real tools and resources/l...
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Kin Score
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