Fluxx website screenshot

Fluxx

Fluxx is a cloud grants management platform for foundations, government agencies, corporations, and nonprofits, covering the full grant lifecycle from funding announcement through pre-award applications, post-award payments, and measurement and evaluation. Fluxx Grantmaker includes a RESTful API (REST API v2) available to customers for building custom integrations with financial, CRM, and business-intelligence systems. The API is exposed per-client on each customer's own Fluxx instance under https://{client}.fluxx.io/api/rest/v2, is authenticated with OAuth 2.0 credentials created in that instance, and is driven by a dynamic, instance-specific data model whose reference documentation is generated at /api/rest/v2/doc for each deployment. Because the surface is per-instance and gated behind an authenticated customer deployment, the endpoints below are honestly modeled from Fluxx's documented REST v2 conventions rather than pulled from a single public reference.

Fluxx publishes 4 APIs on the APIs.io network. Tagged areas include Grants Management, Grantmaking, Nonprofit, Philanthropy, and Foundations.

Fluxx’s developer surface includes documentation and 6 more developer resources.

11.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
4 APIs
Grants ManagementGrantmakingNonprofitPhilanthropyFoundationsREST API

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 11.4/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 1.6 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 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 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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/fluxx-grants: 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 4

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

Fluxx Records API

RESTful create, list, get, update, and delete access to Fluxx model records such as GrantRequest, Organization, and RequestTransaction under /api/rest/v2/{model}. Supports colum...

Fluxx OAuth API

OAuth 2.0 authorization for the Fluxx REST API. Administrators register an application at /oauth/applications on their instance to obtain a client ID and client secret, then exc...

Fluxx Documents API

Access to files and documents attached to grant records, exposed through Fluxx document models (such as ModelDocument) under /api/rest/v2/{model}. Used to list and retrieve atta...

Fluxx Users and Organizations API

RESTful access to Fluxx people and organization records - the User and Organization models under /api/rest/v2/{model} that represent grantees, grantseekers, staff, and funding o...

Security Posture 3

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

Fluxx Grants Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Fluxx Grants Vulnerability Disclosure

security.txt · contact published

SECURITY

Fluxx Grants Trust Center

SOC 2, ISO 27001

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: fluxx-grants
url: https://raw.githubusercontent.com/api-evangelist/fluxx-grants/refs/heads/main/apis.yml
name: Fluxx
kind: company
description: Fluxx is a cloud grants management platform for foundations, government agencies, corporations, and nonprofits,
  covering the full grant lifecycle from funding announcement through pre-award applications, post-award payments, and measurement
  and evaluation. Fluxx Grantmaker includes a RESTful API (REST API v2) available to customers for building custom integrations
  with financial, CRM, and business-intelligence systems. The API is exposed per-client on each customer's own Fluxx instance
  under https://{client}.fluxx.io/api/rest/v2, is authenticated with OAuth 2.0 credentials created in that instance, and is
  driven by a dynamic, instance-specific data model whose reference documentation is generated at /api/rest/v2/doc for each
  deployment. Because the surface is per-instance and gated behind an authenticated customer deployment, the endpoints below
  are honestly modeled from Fluxx's documented REST v2 conventions rather than pulled from a single public reference.
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fluxx-grants.png
tags:
- Grants Management
- Grantmaking
- Nonprofit
- Philanthropy
- Foundations
- REST API
created: '2026-07-05'
modified: '2026-07-05'
specificationVersion: '0.19'
apis:
- aid: fluxx-grants:fluxx-grants-records-api
  name: Fluxx Records API
  tags:
  - Records
  - Models
  - Grant Requests
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.fluxx.io/products/grantmaker-fluxx-grants-management-software
  baseURL: https://{client}.fluxx.io/api/rest/v2
  properties:
  - url: https://www.fluxx.io/products/grantmaker-fluxx-grants-management-software
    type: Documentation
  - url: README.md
    type: Overview
  description: RESTful create, list, get, update, and delete access to Fluxx model records such as GrantRequest, Organization,
    and RequestTransaction under /api/rest/v2/{model}. Supports column selection (cols), record filtering (filter, e.g. grant_id
    eq R-2024-00003), and pagination (page, per_page). Endpoints are modeled from Fluxx REST v2 conventions; the concrete
    field set and available models are defined per customer instance and are gated behind that instance.
- aid: fluxx-grants:fluxx-grants-oauth-api
  name: Fluxx OAuth API
  tags:
  - Authentication
  - OAuth
  - Tokens
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/fluxxlabs/fluxx_api_toolkit_java
  baseURL: https://{client}.fluxx.io/oauth
  properties:
  - url: https://github.com/fluxxlabs/fluxx_api_toolkit_java
    type: Documentation
  - url: README.md
    type: Overview
  description: OAuth 2.0 authorization for the Fluxx REST API. Administrators register an application at /oauth/applications
    on their instance to obtain a client ID and client secret, then exchange them for an access token at /oauth/token. Endpoints
    are modeled from Fluxx's documented OAuth flow; the authorization surface lives on each customer's own instance.
- aid: fluxx-grants:fluxx-grants-documents-api
  name: Fluxx Documents API
  tags:
  - Documents
  - Files
  - Attachments
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/RockefellerArchiveCenter/fluxx_exporter
  baseURL: https://{client}.fluxx.io/api/rest/v2
  properties:
  - url: https://github.com/RockefellerArchiveCenter/fluxx_exporter
    type: Documentation
  - url: README.md
    type: Overview
  description: Access to files and documents attached to grant records, exposed through Fluxx document models (such as ModelDocument)
    under /api/rest/v2/{model}. Used to list and retrieve attachments associated with a GrantRequest or other record. Endpoints
    are modeled from Fluxx REST v2 conventions and are gated behind the customer instance.
- aid: fluxx-grants:fluxx-grants-users-api
  name: Fluxx Users and Organizations API
  tags:
  - Users
  - Organizations
  - People
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.fluxx.io/products/grantmaker-fluxx-grants-management-software
  baseURL: https://{client}.fluxx.io/api/rest/v2
  properties:
  - url: https://www.fluxx.io/products/grantmaker-fluxx-grants-management-software
    type: Documentation
  - url: README.md
    type: Overview
  description: RESTful access to Fluxx people and organization records - the User and Organization models under /api/rest/v2/{model}
    that represent grantees, grantseekers, staff, and funding organizations. Endpoints are modeled from Fluxx REST v2 conventions;
    concrete fields and permissions are defined per customer instance.
common:
- type: TrustCenter
  url: security/fluxx-grants-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/fluxx-grants-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/fluxx-grants-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/fluxx
- type: Website
  url: https://www.fluxx.io/
- type: GitHubOrganization
  url: https://github.com/fluxxlabs
- type: Documentation
  url: https://www.fluxx.io/resource-center
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com