Fluidity

Fluidity Money is a decentralized finance (DeFi) protocol that turns idle crypto into "Fluid Assets" (fAssets) — ERC-20-compatible wrapped tokens on Ethereum/Arbitrum and SPL tokens on Solana that pay instant, probabilistic rewards every time they are transferred (the Transfer Reward Function). Yield is sourced from lending protocols such as Compound and AAVE on Ethereum and Solend on Solana, and distributed through "utility mining." Fluidity exposes a public GraphQL API over its webapp and landing-page data, publishes EVM ABIs and Solana program/account structures for on-chain integration, and is governed by the $FLY token. Fluidity Labs sunsetted active protocol development on 2026-04-01 to focus on the Superposition ecosystem; docs, status page, and on-chain contracts remain live.

Fluidity is listed with 1 API on the APIs.io network. Tagged areas include Company, Web3, DeFi, GraphQL, and Ethereum.

Fluidity’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Front door AI 1/6 silent Heartbeat 100/100 alive library Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Web3 DeFi GraphQL Ethereum Solana Blockchain Tokenization Rewards Defunct Cryptocurrency

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 1.8 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points

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.

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/fluidity/apis.yml: open an issue on github.com/api-evangelist/fluidity 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Stablecoins and Tokenization (stablecoin issuers, tokenized assets)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Fluidity GraphQL API

Public GraphQL endpoint exposing Fluidity's on-chain and webapp data — transactions, rewards, prize-pool and Fluid Asset metrics across Arbitrum, Solana, Sui, and the Superposit...

Security Posture 2

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

Fluidity Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Fluidity Vulnerability Disclosure

contact published

SECURITY

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 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 3

Status, limits, changes, and where to get help

Roadmap

Roadmap

StatusPage

StatusPage

Support

Support

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Whitepapers

Whitepapers

Source (apis.yml)

aid: fluidity
name: Fluidity
description: Fluidity Money is a decentralized finance (DeFi) protocol that turns idle crypto into "Fluid Assets" (fAssets)
  — ERC-20-compatible wrapped tokens on Ethereum/Arbitrum and SPL tokens on Solana that pay instant, probabilistic rewards
  every time they are transferred (the Transfer Reward Function). Yield is sourced from lending protocols such as Compound
  and AAVE on Ethereum and Solend on Solana, and distributed through "utility mining." Fluidity exposes a public GraphQL API
  over its webapp and landing-page data, publishes EVM ABIs and Solana program/account structures for on-chain integration,
  and is governed by the $FLY token. Fluidity Labs sunsetted active protocol development on 2026-04-01 to focus on the Superposition
  ecosystem; docs, status page, and on-chain contracts remain live.
url: https://raw.githubusercontent.com/api-evangelist/fluidity/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  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: '2026-11-06'
  method: derived
image: https://docs.fluidity.money/docs/partnerships-collaboration/partnerships/brand-assets
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Company
- Web3
- DeFi
- GraphQL
- Ethereum
- Solana
- Blockchain
- Tokenization
- Rewards
- Defunct
- Cryptocurrency
tags_raw:
- Company
- Crypto Web3
- DeFi
- GraphQL
- Ethereum
- Solana
- Blockchain
- Tokenization
- Rewards
- Defunct
- Web3
- Cryptocurrency
apis:
- name: Fluidity GraphQL API
  description: Public GraphQL endpoint exposing Fluidity's on-chain and webapp data — transactions, rewards, prize-pool and
    Fluid Asset metrics across Arbitrum, Solana, Sui, and the Superposition devnet.
  humanURL: https://docs.fluidity.money/docs/developers/graphql
  properties:
  - type: GraphQL
    url: https://docs.fluidity.money/docs/developers/graphql
  - type: APIReference
    url: https://docs.fluidity.money/docs/developers/graphql
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://fluidity.money
- type: DeveloperPortal
  url: https://docs.fluidity.money/docs/developers
- type: Documentation
  url: https://docs.fluidity.money/
- type: APIReference
  url: https://docs.fluidity.money/docs/developers/graphql
- type: GettingStarted
  url: https://docs.fluidity.money/docs/learning-and-getting-started
- type: Roadmap
  url: https://docs.fluidity.money/docs/fundamentals/roadmap
- type: Blog
  url: https://blog.fluidity.money/
- type: StatusPage
  url: https://status.fluidity.money
- type: Support
  url: https://discord.gg/CNvpJk4HpC
- type: GitHubOrganization
  url: https://github.com/fluidity-money
- type: Whitepapers
  url: https://docs.fluidity.money/docs/developers/whitepaper-source-code
- type: LLMsTxt
  url: llms/fluidity-llms.txt
- type: Packages
  url: packages/fluidity-packages.yml
- type: SDKs
  url: packages/fluidity-packages.yml
- type: Lifecycle
  url: lifecycle/fluidity-lifecycle.yml
- type: DomainSecurity
  url: security/fluidity-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/fluidity-vulnerability-disclosure.yml
- type: Security
  url: https://docs.fluidity.money/docs/security
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence
x-status-source: https://www.fluidity.money/
x-status-note: 'fluidity.money: Fluidity is winding down its Fluid Assets (fUSDC, fUSDT, fFRAX on Arbitrum) as the team shifts
  its full focus to the Superposition ecosystem. roadmap#589'

Fluidity API — frequently asked questions

Does Fluidity have an API?

Yes. APIs.io lists 1 API from Fluidity, including Fluidity GraphQL API.

Is the Fluidity API ready for AI agents?

Fluidity has a Kin Score of 0.0 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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