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 is listed with 4 APIs on the APIs.io network. Tagged areas include Grants Management, Grantmaking, Non-Profit, Philanthropy, and Foundations.

Fluxx’s developer surface includes engineering blog, documentation, and 8 more developer resources.

13.7/100 emerging ▬ flat Agent 0/100 human only Front door AI 4/6 moderate Heartbeat 50/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →
4 APIs
Grants ManagementGrantmakingNon-ProfitPhilanthropyFoundationsREST API

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0
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/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
  • 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) Ask about this →
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
13 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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.
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Ask about:
Fluxx Grants · a person reads this and replies by email.
or email info@apis.io
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/fluxx-grants/apis.yml: open an issue on github.com/api-evangelist/fluxx-grants 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 →

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...

Compliance 1

Attestations the provider states (SOC 2, ISO 27001 and others), quoted from its own trust page. APIs.io verifies none of them.

Fluxx

1 quoted statement, read from Fluxx's own page on 2026-11-09.

COMPLIANCE

Security Posture 3

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

Fluxx Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Fluxx Vulnerability Disclosure

security.txt · contact published

SECURITY

Fluxx 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 4

The organization behind the API

Other 1

Properties that don't map to a standard resource type

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.
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:
  - security
  generated: '2026-11-13'
  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: '2026-10-06'
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
  - OAuth
  - 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:
- url: https://www.fluxx.io/blog
  type: Blog
- url: https://www.fluxx.io/blog/rss.xml
  type: BlogRSS
- 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
- type: Attestations
  url: compliance/fluxx-grants-compliance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Fluxx API — frequently asked questions

Does Fluxx have an API?

Yes. APIs.io lists 4 APIs from Fluxx, including Fluxx Records API, Fluxx OAuth API and Fluxx Documents API, and 1 more.

Is the Fluxx API ready for AI agents?

Fluxx has a Kin Score of 13.7 out of 100 (emerging) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-13.

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