Fastrouter

FastRouter.ai provides a unified API gateway for large language models, enabling enterprises to route, compare, and operate across over 200 AI models via a single OpenAI‑compatible endpoint. It offers features such as automatic model selection, cost‑optimization insights, response caching, prompt management, and comprehensive analytics, helping teams build scalable, reliable AI applications while reducing latency and expense.

Fastrouter publishes 14 API contracts indexed on the APIs.io network, including Audio API, Batches API, Embeddings API, and 11 more. Tagged areas include Company, Artificial Intelligence, API Gateway, LLM, and Enterprise.

The Fastrouter catalog on APIs.io includes 1 Spectral governance ruleset.

Fastrouter’s developer surface includes CLI, changelog, API reference, authentication, documentation, getting-started guide, pricing, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

42.7/100 developing ▼ -10.4 Agent 20/100 agent aware Heartbeat 96/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Company Artificial Intelligence API Gateway LLM Enterprise

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

AI Model Services

AE-110

AudioChat CompletionsEmbeddingsGetAsyncResponseImagesModel

POST /api/v1/images/generations POST /api/v1/images/edits POST /api/v1/audio/transcriptions POST /api/v1/audio/translations

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 42.7/100 · developing

Contract Quality 8.8 / 19

Developer Ergonomics 5.9 / 15

Access Clarity 9.3 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 2.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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

Pagination 5 / 5

Distinct Operations 0 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 46.8 — up to +13.3 composite points
Developer Ergonomics scores 39.3 — up to +12.1 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/fastrouter/apis.yml: open an issue on github.com/api-evangelist/fastrouter to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 14

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

Fastrouter Audio API

The Audio API from Fastrouter — 2 operation(s) for audio.

Fastrouter Batches API

The Batches API from Fastrouter — 2 operation(s) for batches.

Fastrouter Embeddings API

The Embeddings API from Fastrouter — 1 operation(s) for embeddings.

Fastrouter Files API

The Files API from Fastrouter — 2 operation(s) for files.

Fastrouter Generation API

The Generation API from Fastrouter — 1 operation(s) for generation.

Fastrouter Get Async Response API

The GetAsyncResponse API from Fastrouter — 1 operation(s) for getasyncresponse.

Fastrouter Get Prompt To Audio Response API

The GetPromptToAudioResponse API from Fastrouter — 1 operation(s) for getprompttoaudioresponse.

Fastrouter Images API

The Images API from Fastrouter — 2 operation(s) for images.

Fastrouter Model API

The Model API from Fastrouter — 2 operation(s) for model.

Fastrouter Models API

The Models API from Fastrouter — 1 operation(s) for models.

Fastrouter Moderations API

The Moderations API from Fastrouter — 1 operation(s) for moderations.

Fastrouter Responses API

The Responses API from Fastrouter — 1 operation(s) for responses.

Fastrouter Videos API

The Videos API from Fastrouter — 1 operation(s) for videos.

Fastrouter Chat Completions API

The Chat Completions API from Fastrouter — 1 operation(s) for chat completions.

Scroll for all 14

Fastrouter API pricing

Prices published by Fastrouter, read 2026-10-16 from fastrouter.ai/pricing.

Plan	Price
Starter	$0/ month
Pro	$199/ month
Business	$799/ month
Enterprise	Custom

Plan details, limits and sources →

Billed by: seat · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Fastrouter Plans Pricing

4 plans

PLANS

Fastrouter Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Fastrouter

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Fastrouter Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Fastrouter API Rules

9 rules · 7 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

JsonObject

0 properties

JSON SCHEMA

Security Posture 2

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

Fastrouter Authentication

http · 1 scheme

SECURITY

Fastrouter Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Fastrouter Agentic Access

19 operations · 13 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

DataModel

DataModel

Conformance

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: fastrouter
name: Fastrouter
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://fastrouter.ai/opengraph-image
description: FastRouter.ai provides a unified API gateway for large language models, enabling enterprises to route, compare,
  and operate across over 200 AI models via a single OpenAI‑compatible endpoint. It offers features such as automatic model
  selection, cost‑optimization insights, response caching, prompt management, and comprehensive analytics, helping teams build
  scalable, reliable AI applications while reducing latency and expense.
url: https://raw.githubusercontent.com/api-evangelist/fastrouter/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-16 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-16'
modified: '2026-10-16'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-17
tags:
- Company
- Artificial Intelligence
- API Gateway
- LLM
- Enterprise
tags_raw:
- Company
- AI
- API Gateway
- LLM
- Enterprise
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/fastrouter-capability-edges.yml
  name: Fastrouter Business Capability Map
- type: AgenticAccess
  url: agentic-access/fastrouter-agentic-access.yml
- type: Plans
  url: plans/fastrouter-plans-pricing.yml
- type: Spectral
  url: rules/fastrouter-rules.yml
- type: DataModel
  url: data-model/fastrouter-data-model.yml
- type: CLI
  url: cli/fastrouter-cli.yml
- type: ChangeLog
  url: changelog/fastrouter-changelog.yml
- type: Conformance
  url: conformance/fastrouter-conformance.yml
- type: LLMsTxt
  url: llms/fastrouter-llms.txt
- type: WellKnown
  url: well-known/fastrouter-well-known.yml
- type: Hosts
  url: hosts/fastrouter-hosts.yml
- type: Vendors
  url: vendors/fastrouter-vendors.yml
- type: TermsOfService
  url: https://fastrouter.ai/terms
- type: PrivacyPolicy
  url: https://fastrouter.ai/privacy
- type: ChangeLog
  url: https://docs.fastrouter.ai/product-updates/changelog
- type: APIReference
  url: https://docs.fastrouter.ai/api-reference
- type: DeveloperPortal
  url: https://api.fastrouter.ai</span
- type: GitHubOrganization
  url: https://github.com/fastrouter
- type: Authentication
  url: authentication/fastrouter-authentication.yml
- type: DomainSecurity
  url: security/fastrouter-domain-security.yml
- type: Website
  url: https://fastrouter.ai/
- type: Documentation
  url: https://docs.fastrouter.ai/
- type: GettingStarted
  url: https://docs.fastrouter.ai/explore-features/quickstart
- type: Pricing
  url: https://fastrouter.ai/pricing
- type: Blog
  url: https://fastrouter.ai/blog
- type: SignUp
  url: https://fastrouter.ai/sign-up
- type: Contact
  url: https://fastrouter.ai/contact
apis:
- aid: fastrouter:fastrouter-audio-api
  name: Fastrouter Audio API
  description: The Audio API from Fastrouter — 2 operation(s) for audio.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Audio
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-audio-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-batches-api
  name: Fastrouter Batches API
  description: The Batches API from Fastrouter — 2 operation(s) for batches.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Batches
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-batches-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-embeddings-api
  name: Fastrouter Embeddings API
  description: The Embeddings API from Fastrouter — 1 operation(s) for embeddings.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Embeddings
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-embeddings-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-files-api
  name: Fastrouter Files API
  description: The Files API from Fastrouter — 2 operation(s) for files.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - File
  tags_raw:
  - Files
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-files-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-generation-api
  name: Fastrouter Generation API
  description: The Generation API from Fastrouter — 1 operation(s) for generation.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Generation
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-generation-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-getasyncresponse-api
  name: Fastrouter Get Async Response API
  description: The GetAsyncResponse API from Fastrouter — 1 operation(s) for getasyncresponse.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - GetAsyncResponse
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-getasyncresponse-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-getprompttoaudioresponse-api
  name: Fastrouter Get Prompt To Audio Response API
  description: The GetPromptToAudioResponse API from Fastrouter — 1 operation(s) for getprompttoaudioresponse.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - GetPromptToAudioResponse
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-getprompttoaudioresponse-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-images-api
  name: Fastrouter Images API
  description: The Images API from Fastrouter — 2 operation(s) for images.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Image
  tags_raw:
  - Images
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-images-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-model-api
  name: Fastrouter Model API
  description: The Model API from Fastrouter — 2 operation(s) for model.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Model
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-model-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-models-api
  name: Fastrouter Models API
  description: The Models API from Fastrouter — 1 operation(s) for models.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-models-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-moderations-api
  name: Fastrouter Moderations API
  description: The Moderations API from Fastrouter — 1 operation(s) for moderations.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Moderations
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-moderations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-responses-api
  name: Fastrouter Responses API
  description: The Responses API from Fastrouter — 1 operation(s) for responses.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Responses
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-responses-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-videos-api
  name: Fastrouter Videos API
  description: The Videos API from Fastrouter — 1 operation(s) for videos.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Video
  tags_raw:
  - Videos
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-videos-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
- aid: fastrouter:fastrouter-chat-completions-api
  name: Fastrouter Chat Completions API
  description: The Chat Completions API from Fastrouter — 1 operation(s) for chat completions.
  humanURL: https://docs.fastrouter.ai/api-reference
  baseURL: https://api.fastrouter.ai
  tags:
  - Chat Completions
  properties:
  - type: OpenAPI
    url: openapi/fastrouter-chat-completions-api-openapi.yml
  - type: JSONSchema
    url: json-schema/fastrouter-json-object-schema.json
x-enrichment:
  date: '2026-10-16'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Fastrouter API — frequently asked questions

Does Fastrouter have an API?

Yes. APIs.io lists 14 APIs from Fastrouter, including Fastrouter Audio API, Fastrouter Batches API and Fastrouter Embeddings API, and 11 more.

Is there an OpenAPI specification for the Fastrouter API?

Yes. APIs.io indexes 14 OpenAPI specifications for Fastrouter, each linked for download from this page.

How do I authenticate with the Fastrouter API?

Fastrouter uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Fastrouter Authentication.

How much does the Fastrouter API cost?

Fastrouter publishes its prices; its Starter plan is $0/ month as of 2026-10-16. APIs.io lists 4 pricing plans for Fastrouter, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fastrouter API ready for AI agents?

Fastrouter has a Kin Score of 42.7 out of 100 (developing) and an Agent Readiness score of 19.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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