Recursal AI, Inc.

Recursal AI, Inc. operates Featherless AI, a serverless AI inference platform that provides unified, OpenAI-compatible API access to tens of thousands of open-weight large language models sourced from Hugging Face. A single API key and base URL (https://api.featherless.ai/v1) give developers drop-in access to models ranging from small 7B instruct models to 405B-plus parameter models, under flat-rate, concurrency-based subscriptions with unlimited monthly requests and a no-logging policy on prompts and chat history. The platform is built by researchers who contribute to RWKV, a Linux Foundation project, and has raised a $20M Series A. Recursal AI was surfaced as a portfolio company of 500 Global and enriched by the API Evangelist pipeline.

Recursal AI, Inc. publishes 3 APIs on the APIs.io network: Account API, Chat API, and Models API. Tagged areas include Company, Artificial Intelligence, Machine-Learning, LLM, and Inference.

Recursal AI, Inc.’s developer surface includes documentation, API reference, getting-started guide, quickstart, pricing, signup flow, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.5/100 thin ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

3 APIs

Company Artificial Intelligence Machine-Learning LLM Inference Serverless Generative AI Developer Tools OpenAI-CompatibleRWKV

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 33.5/100 · thin

Contract Quality 3.1 / 23

Developer Ergonomics 10.6 / 18

Access Clarity 7.1 / 18

Operational Transparency 2.2 / 12

Contract Governance 0.5 / 11

Discoverability 7.3 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/recursal-ai-inc: 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 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

Recursal AI, Inc. Account API

Plan and concurrency information

Recursal AI, Inc. Chat API

OpenAI-compatible chat and text completion generation

Recursal AI, Inc. Models API

Model catalog and metadata

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Featherless AI Serverless Inference Account API

OPEN COLLECTION

Featherless AI Serverless Inference Account Chat API

OPEN COLLECTION

Featherless AI Serverless Inference Account Models API

OPEN COLLECTION

Rate Limits 1

Documented rate limits and quota policies.

Recursal Ai Inc Rate Limits

0 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Recursal Ai Inc Authentication

http · 1 scheme

SECURITY

Recursal Ai Inc Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Recursal Ai Inc Agentic Access

5 operations · 3 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Quickstart

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

AgenticAccess

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

CompanyWebsite

CompanyWebsite

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

Models

Models

Source (apis.yml)

aid: recursal-ai-inc
name: Recursal AI, Inc.
description: Recursal AI, Inc. operates Featherless AI, a serverless AI inference platform that provides unified, OpenAI-compatible
  API access to tens of thousands of open-weight large language models sourced from Hugging Face. A single API key and base
  URL (https://api.featherless.ai/v1) give developers drop-in access to models ranging from small 7B instruct models to 405B-plus
  parameter models, under flat-rate, concurrency-based subscriptions with unlimited monthly requests and a no-logging policy
  on prompts and chat history. The platform is built by researchers who contribute to RWKV, a Linux Foundation project, and
  has raised a $20M Series A. Recursal AI was surfaced as a portfolio company of 500 Global and enriched by the API Evangelist
  pipeline.
url: https://raw.githubusercontent.com/api-evangelist/recursal-ai-inc/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://cdn.prod.website-files.com/6979c6c70c21b50639123793/69a171cf1a87499ba814df9c_OG%20Image_%20Home.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- Machine-Learning
- LLM
- Inference
- Serverless
- Generative AI
- Developer Tools
- OpenAI-Compatible
- RWKV
tags_raw:
- Company
- Artificial Intelligence
- Machine Learning
- LLM
- Inference
- Serverless
- Generative AI
- Developer Tools
- OpenAI Compatible
- RWKV
apis:
- aid: recursal-ai-inc:recursal-ai-inc-account-api
  name: Recursal AI, Inc. Account API
  description: Plan and concurrency information
  humanURL: https://featherless.ai/docs/overview
  baseURL: https://api.featherless.ai/v1
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/recursal-ai-inc-account-api-openapi.yml
  - type: Documentation
    url: https://featherless.ai/docs/api-overview-and-common-options
- aid: recursal-ai-inc:recursal-ai-inc-chat-api
  name: Recursal AI, Inc. Chat API
  description: OpenAI-compatible chat and text completion generation
  humanURL: https://featherless.ai/docs/overview
  baseURL: https://api.featherless.ai/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/recursal-ai-inc-chat-api-openapi.yml
  - type: Documentation
    url: https://featherless.ai/docs/api-overview-and-common-options
- aid: recursal-ai-inc:recursal-ai-inc-models-api
  name: Recursal AI, Inc. Models API
  description: Model catalog and metadata
  humanURL: https://featherless.ai/docs/overview
  baseURL: https://api.featherless.ai/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/recursal-ai-inc-models-api-openapi.yml
  - type: Documentation
    url: https://featherless.ai/docs/api-overview-and-common-options
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/recursal-ai-inc-featherless-overlay.yaml
- type: DomainSecurity
  url: security/recursal-ai-inc-domain-security.yml
- type: Website
  url: https://featherless.ai
- type: CompanyWebsite
  url: https://recursal.ai
- type: DeveloperPortal
  url: https://featherless.ai/docs/overview
- type: Documentation
  url: https://featherless.ai/docs/overview
- type: APIReference
  url: https://featherless.ai/docs/api-overview-and-common-options
- type: GettingStarted
  url: https://featherless.ai/docs/getting-started
- type: Quickstart
  url: https://featherless.ai/docs/quickstart-guide
- type: Pricing
  url: https://featherless.ai/#pricing
- type: SignUp
  url: https://featherless.ai/register
- type: TermsOfService
  url: https://featherless.ai/terms
- type: PrivacyPolicy
  url: https://featherless.ai/privacy
- type: Blog
  url: https://featherless.ai/blog
- type: Support
  url: https://featherless.ai/discord
- type: GitHubOrganization
  url: https://github.com/recursal
- type: StatusPage
  url: https://featherless.ai/status
- type: Models
  url: https://featherless.ai/models
- type: LLMsTxt
  url: llms/recursal-ai-inc-llms.txt
- type: Authentication
  url: authentication/recursal-ai-inc-authentication.yml
- type: Conventions
  url: conventions/recursal-ai-inc-conventions.yml
- type: RateLimits
  url: rate-limits/recursal-ai-inc-rate-limits.yml
- type: ErrorCatalog
  url: errors/recursal-ai-inc-problem-types.yml
- type: Lifecycle
  url: lifecycle/recursal-ai-inc-lifecycle.yml
- type: Conformance
  url: conformance/recursal-ai-inc-conformance.yml
- type: DataModel
  url: data-model/recursal-ai-inc-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/recursal-ai-inc-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/recursal-ai-inc-agentic-access.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 17
  pass: local-v1

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/recursal-ai-inc"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/recursal-ai-inc/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/recursal-ai-inc/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.