Fairmarkit

Fairmarkit is an autonomous sourcing and strategic procurement platform that uses AI agents to automate the full sourcing lifecycle — from intake and request creation through RFQ/RFP/RFI events, supplier bidding, award, and purchase-order handoff to ERP and P2P systems. Fairmarkit publishes a public, OpenAPI 3.1-described Buyer Self-Service REST API (v3 and v4) and a Supplier Public API, secured with an X-FM-API-KEY header, covering RFQ/RFP events, requests and request items, suppliers, purchase orders, price books, datasets/data fields, business units, categories, identities, permission sets, data exports, and file attachments, plus a rich webhook notification catalog for procurement events. The company is backed by GGV Capital and Insight Partners.

Fairmarkit publishes 2 APIs on the APIs.io network: Buyer Public API and Supplier Public API. Tagged areas include Company, Procurement, Sourcing, Supply Chain, and Purchasing.

The Fairmarkit catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Fairmarkit’s developer surface includes documentation, API reference, getting-started guide, authentication, support, engineering blog, changelog, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub
44.1/100 thin Agent 71/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
2 APIs 1 MCP Servers 0 Features
CompanyProcurementSourcingSupply ChainPurchasingSuppliersRFQRFPSpend ManagementWebhooks

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 44.1/100 · thin
Contract Quality 9.4 / 25
Developer Ergonomics 13.5 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 6.2 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 71/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/fairmarkit: 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

Fairmarkit Buyer Public API

RESTful buyer-side Self-Service API (v3 + v4) for managing RFQ and RFP events, requests and request items, suppliers, purchase orders, price books, datasets, business units, cat...

Fairmarkit Supplier Public API

Supplier-side Public API for retrieving buyer requests, reviewing request responses, submitting responses/bids, and rejecting requests. OpenAPI 3.1, API-key authenticated via th...

MCP Servers

fairmarkit-mcp.yml

MCP SERVER

Event Specifications

Fairmarkit Webhooks

ASYNCAPI

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks
Webhooks
 Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 Security
Security
 Compliance
Compliance

Operate 4

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog
 ReleaseNotes
ReleaseNotes
 Deprecation
Deprecation

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: fairmarkit
name: Fairmarkit
description: Fairmarkit is an autonomous sourcing and strategic procurement platform that uses AI agents to automate the full
  sourcing lifecycle — from intake and request creation through RFQ/RFP/RFI events, supplier bidding, award, and purchase-order
  handoff to ERP and P2P systems. Fairmarkit publishes a public, OpenAPI 3.1-described Buyer Self-Service REST API (v3 and
  v4) and a Supplier Public API, secured with an X-FM-API-KEY header, covering RFQ/RFP events, requests and request items,
  suppliers, purchase orders, price books, datasets/data fields, business units, categories, identities, permission sets,
  data exports, and file attachments, plus a rich webhook notification catalog for procurement events. The company is backed
  by GGV Capital and Insight Partners.
url: https://raw.githubusercontent.com/api-evangelist/fairmarkit/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- ggv-capital
- insight-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
image: https://cdn.prod.website-files.com/6974c3dfc9de89aed672a42c/69df9b1468ca1d50addc7ada_aac4c2022c593d27762cac87054f89ec_Opengraph_Homepage.png
tags:
- Company
- Procurement
- Sourcing
- Supply Chain
- Purchasing
- Suppliers
- RFQ
- RFP
- Spend Management
- Webhooks
apis:
- name: Fairmarkit Buyer Public API
  description: RESTful buyer-side Self-Service API (v3 + v4) for managing RFQ and RFP events, requests and request items,
    suppliers, purchase orders, price books, datasets, business units, categories, identities, and data exports. OpenAPI 3.1,
    API-key authenticated via the X-FM-API-KEY header.
  humanURL: https://developers.fairmarkit.com/reference/getting-started-with-fairmarkit-api
  baseURL: https://staging.fairmarkit.com
  properties:
  - type: OpenAPI
    url: openapi/fairmarkit-buyer-openapi.json
  - type: Overlay
    url: overlays/fairmarkit-buyer-overlay.yaml
  - type: Documentation
    url: https://developers.fairmarkit.com/reference/getting-started-with-fairmarkit-api
- name: Fairmarkit Supplier Public API
  description: Supplier-side Public API for retrieving buyer requests, reviewing request responses, submitting responses/bids,
    and rejecting requests. OpenAPI 3.1, API-key authenticated via the X-FM-API-KEY header.
  humanURL: https://developers.fairmarkit.com/reference/requests
  baseURL: https://uat.fairmarkit.com
  properties:
  - type: OpenAPI
    url: openapi/fairmarkit-supplier-openapi.json
  - type: Overlay
    url: overlays/fairmarkit-supplier-overlay.yaml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/fairmarkit-domain-security.yml
- type: AgenticAccess
  url: agentic-access/fairmarkit-agentic-access.yml
- type: Website
  url: https://www.fairmarkit.com/
- type: DeveloperPortal
  url: https://developers.fairmarkit.com/
- type: Documentation
  url: https://docs.fairmarkit.com/
- type: APIReference
  url: https://developers.fairmarkit.com/reference/getting-started-with-fairmarkit-api
- type: GettingStarted
  url: https://developers.fairmarkit.com/reference/getting-started-with-fairmarkit-api
- type: Authentication
  url: authentication/fairmarkit-authentication.yml
- type: Support
  url: https://fmkt.zendesk.com/hc/en-us
- type: Blog
  url: https://www.fairmarkit.com/blog
- type: GitHubOrganization
  url: https://github.com/fairmarkit
- type: TermsOfService
  url: https://www.fairmarkit.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.fairmarkit.com/privacy-policy
- type: Security
  url: https://www.fairmarkit.com/security-statement
- type: Compliance
  url: https://www.fairmarkit.com/security-compliance
- type: Integrations
  url: https://www.fairmarkit.com/integrations
- type: ChangeLog
  url: changelog/fairmarkit-changelog.yml
- type: ReleaseNotes
  url: https://docs.fairmarkit.com/release-notes
- type: LLMsTxt
  url: llms/fairmarkit-llms.txt
- type: Webhooks
  url: asyncapi/fairmarkit-webhooks.yml
- type: Conventions
  url: conventions/fairmarkit-conventions.yml
- type: ErrorCatalog
  url: errors/fairmarkit-problem-types.yml
- type: Lifecycle
  url: lifecycle/fairmarkit-lifecycle.yml
- type: Deprecation
  url: lifecycle/fairmarkit-lifecycle.yml
- type: Conformance
  url: conformance/fairmarkit-conformance.yml
- type: DataModel
  url: data-model/fairmarkit-data-model.yml
- type: MCPServer
  url: mcp/fairmarkit-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence