Grin

GRIN is a creator management and influencer marketing platform for consumer and eCommerce brands, operating in the creator economy. Brands use GRIN to discover creators, manage relationships and content, run affiliate and ambassador programs, handle creator payments, track performance, and measure ROI at scale. The product line includes GRIN Classic, a manual creator and affiliate management platform, and Gia, an AI assistant that automates affiliate program management. GRIN exposes a bi-directional REST API (documented on Stoplight at api.grin.co) so a brand's own software can synchronize creators, content, and program data with GRIN, alongside native integrations for Shopify, Klaviyo, PayPal, Slack, and other commerce tools.

Grin publishes 2 APIs on the APIs.io network. Tagged areas include Company, Influencer Marketing, Creator Economy, Creator Management, and Affiliate Marketing.

Grin’s developer surface includes API reference, documentation, support, engineering blog, signup flow, pricing, authentication, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.7/100 developing ▬ flat Agent 9/100 agent aware saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

2 APIs 1 MCP Servers

Company Influencer Marketing Creator Economy Creator Management Affiliate Marketing Marketing Social-Media E-Commerce

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 40.7/100 · developing

Contract Quality 0.0 / 25

Developer Ergonomics 9.0 / 20

Access Clarity 18.4 / 20

Operational Transparency 3.4 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/grin: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

GRIN API

GRIN's bi-directional REST API lets a brand's own software communicate with GRIN to synchronize creators, content, programs, and reporting data. Reference documentation is publi...

GRIN Gia MCP Server

GRIN's hosted remote Model Context Protocol server for Gia, its AI agent for creator marketing. GRIN documents that "Gia connects to Claude, ChatGPT, and other assistants that s...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Grin Scopes

14 scopes · authorizationCode/clientCredentials/deviceCode

14 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conventions

Conventions

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 7

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Security

Compliance

Authentication

OAuthScopes

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

Support

Community

StatusPage

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

Pricing

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: grin
name: Grin
description: GRIN is a creator management and influencer marketing platform for consumer and eCommerce brands, operating in
  the creator economy. Brands use GRIN to discover creators, manage relationships and content, run affiliate and ambassador
  programs, handle creator payments, track performance, and measure ROI at scale. The product line includes GRIN Classic,
  a manual creator and affiliate management platform, and Gia, an AI assistant that automates affiliate program management.
  GRIN exposes a bi-directional REST API (documented on Stoplight at api.grin.co) so a brand's own software can synchronize
  creators, content, and program data with GRIN, alongside native integrations for Shopify, Klaviyo, PayPal, Slack, and other
  commerce tools.
url: https://raw.githubusercontent.com/api-evangelist/grin/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- bond-capital
- bullpen-capital
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://grin.co/wp-content/uploads/2022/11/2022_GRIN_Logo_Black_Transparent-Bkgnd-small.webp
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
tags:
- Company
- Influencer Marketing
- Creator Economy
- Creator Management
- Affiliate Marketing
- Marketing
- Social-Media
- E-Commerce
tags_raw:
- Company
- Influencer Marketing
- Creator Economy
- Creator Management
- Affiliate Marketing
- Marketing
- Social Media
- eCommerce
apis:
- name: GRIN API
  description: GRIN's bi-directional REST API lets a brand's own software communicate with GRIN to synchronize creators, content,
    programs, and reporting data. Reference documentation is published on Stoplight at api.grin.co.
  humanURL: https://api.grin.co/
  baseURL: https://api.grin.co
  properties:
  - type: APIReference
    url: https://api.grin.co/
  - type: Documentation
    url: https://help.grin.co
  x-note: api.grin.co is a Stoplight documentation workspace, not a runtime API host. Its home content links https://grin.stoplight.io/docs/grin-open-api-docs,
    which returned HTTP 404 on 2026-08-13 on both the Stoplight subdomain and the api.grin.co custom domain, so no OpenAPI
    could be harvested. The runtime base URL is not published anywhere public and is deliberately not guessed. See lifecycle/grin-lifecycle.yml.
- name: GRIN Gia MCP Server
  description: 'GRIN''s hosted remote Model Context Protocol server for Gia, its AI agent for creator marketing. GRIN documents
    that "Gia connects to Claude, ChatGPT, and other assistants that support MCP", and the endpoint answers live: every path
    returns HTTP 401 with an RFC 9728 challenge naming https://mcp.grin.co/.well-known/oauth-protected-resource, which in
    turn names the resource https://mcp.grin.co/mcp and the authorization server https://auth.grin.co/. The tool manifest
    is OAuth-gated, so tools/list could not be read anonymously.'
  humanURL: https://grin.co/gia
  baseURL: https://mcp.grin.co/mcp
  properties:
  - type: MCPServer
    url: mcp/grin-mcp.yml
  - type: Authentication
    url: authentication/grin-authentication.yml
  - type: OAuthScopes
    url: scopes/grin-scopes.yml
  - type: Documentation
    url: https://grin.co/gia
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: TrustCenter
  url: security/grin-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/grin-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/grin-domain-security.yml
- type: Security
  url: https://grin.co/security/
- type: Compliance
  url: https://grin.co/security/
- type: Website
  url: https://grin.co
- type: DeveloperPortal
  url: https://api.grin.co/
- type: APIReference
  url: https://api.grin.co/
- type: Documentation
  url: https://help.grin.co
- type: Support
  url: https://help.grin.co
- type: Community
  url: https://community.grin.co/
- type: Blog
  url: https://grin.co/blog
- type: StatusPage
  url: https://status.grin.co/
- type: Integrations
  url: https://grin.co/integrations/
- type: SignUp
  url: https://grin.co/get-started/
- type: Login
  url: https://app.grin.co/login
- type: TermsOfService
  url: https://grin.co/terms/
- type: PrivacyPolicy
  url: https://grin.co/privacy/
- type: Pricing
  url: https://grin.co/pricing
- type: MCPServer
  url: mcp/grin-mcp.yml
- type: Authentication
  url: authentication/grin-authentication.yml
- type: OAuthScopes
  url: scopes/grin-scopes.yml
- type: WellKnown
  url: well-known/grin-well-known.yml
- type: LLMsTxt
  url: llms/grin-llms.txt
- type: Plans
  url: plans/grin-plans-pricing.yml
- type: RateLimits
  url: rate-limits/grin-rate-limits.yml
- type: Lifecycle
  url: lifecycle/grin-lifecycle.yml
- type: Conventions
  url: conventions/grin-conventions.yml
- type: Conformance
  url: conformance/grin-conformance.yml
- type: Packages
  url: packages/grin-packages.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 14
  pass: local-v1

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