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, Non-Profit, Philanthropy, and Foundations.

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

🌐 Visit website 📡 Source on GitHub

11.1/100 emerging ▬ flat Agent 0/100 human only Front door AI 4/6 moderate Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

4 APIs

Grants ManagementGrantmakingNon-Profit Philanthropy Foundations REST API

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 11.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 1.3 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/fluxx-grants: 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 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

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

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.
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fluxx-grants.png
tags:
- Grants Management
- Grantmaking
- Non-Profit
- Philanthropy
- Foundations
- REST API
tags_raw:
- Grants Management
- Grantmaking
- Nonprofit
- Philanthropy
- Foundations
- REST API
created: '2026-07-05'
modified: '2026-07-05'
specificationVersion: '0.23'
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
  - Tokens
  tags_raw:
  - 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
  - File
  - Attachments
  tags_raw:
  - 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:
  - User
  - Organization
  - People
  tags_raw:
  - 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

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