Warblerlabs

Warbler Labs is a San Francisco fintech and blockchain company (founded 2020 by Blake West and Michael Sall) that builds and contributes to the Goldfinch Protocol, a decentralized credit protocol for real-world asset lending that provides stablecoin loans and yield generated by off-chain economic activity, and UID (Unique Identity), a KYC/KYB-compliant on-chain identity NFT. The public developer surface is the Goldfinch smart-contract system on Ethereum, an open-source monorepo (github.com/goldfinch-eng), a hosted GraphQL subgraph that indexes protocol state, and developer documentation at dev.goldfinch.finance. Security is central: every release is audited by external firms (CertiK, Trail of Bits) and the protocol runs a $500k Immunefi bug bounty.

Warblerlabs publishes 1 API on the APIs.io network. Tagged areas include Company, Blockchain, DeFi, Fintech, and Credit.

Warblerlabs’ developer surface includes documentation, API reference, engineering blog, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

18.3/100 emerging ▬ flat Agent 12/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

1 APIs 1 MCP Servers

CompanyBlockchainDeFiFintechCreditLendingGraphQLEthereumWeb3Real-World AssetsIdentity

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 18.3/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 7.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 2.1 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 12/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 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

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/warblerlabs: 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 1

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

Goldfinch Subgraph (GraphQL)

Public GraphQL subgraph that indexes useful state about the Goldfinch Protocol (senior pool, tranched pools, backers, borrowers, staked positions, membership) for use by the Gol...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

GraphQL

GraphQL

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

DataModel

DataModel

Conventions

Conventions

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: warblerlabs
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/warblerlabs.png
name: Warblerlabs
description: 'Warbler Labs is a San Francisco fintech and blockchain company (founded 2020 by Blake West and Michael Sall)
  that builds and contributes to the Goldfinch Protocol, a decentralized credit protocol for real-world asset lending that
  provides stablecoin loans and yield generated by off-chain economic activity, and UID (Unique Identity), a KYC/KYB-compliant
  on-chain identity NFT. The public developer surface is the Goldfinch smart-contract system on Ethereum, an open-source monorepo
  (github.com/goldfinch-eng), a hosted GraphQL subgraph that indexes protocol state, and developer documentation at dev.goldfinch.finance.
  Security is central: every release is audited by external firms (CertiK, Trail of Bits) and the protocol runs a $500k Immunefi
  bug bounty.'
url: https://raw.githubusercontent.com/api-evangelist/warblerlabs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kindred-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Blockchain
- DeFi
- Fintech
- Credit
- Lending
- GraphQL
- Ethereum
- Web3
- Real-World Assets
- Identity
apis:
- name: Goldfinch Subgraph (GraphQL)
  description: Public GraphQL subgraph that indexes useful state about the Goldfinch Protocol (senior pool, tranched pools,
    backers, borrowers, staked positions, membership) for use by the Goldfinch Interface and any third party. Served over
    The Graph / Goldsky. Read-only, no authentication required.
  humanURL: https://dev.goldfinch.finance/docs/data/the_graph
  baseURL: https://api.goldsky.com/api/public/project_cmgz2qi2d003xxhp2eqgwfd5o/subgraphs/goldfinch-v2/annual_brown_worm/gn
  properties:
  - type: GraphQL
    url: graphql/goldfinch-subgraph-schema.graphql
  - type: APIReference
    url: https://dev.goldfinch.finance/docs/data/the_graph
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://warblerlabs.com/
- type: DeveloperPortal
  url: https://dev.goldfinch.finance/
- type: Documentation
  url: https://docs.goldfinch.finance/
- type: APIReference
  url: https://dev.goldfinch.finance/docs/data/the_graph
- type: GitHubOrganization
  url: https://github.com/goldfinch-eng
- type: Blog
  url: https://medium.com/warbler-labs
- type: LLMsTxt
  url: llms/warblerlabs-llms.txt
- type: GraphQL
  url: graphql/goldfinch-subgraph-schema.graphql
- type: DataModel
  url: data-model/warblerlabs-data-model.yml
- type: Conventions
  url: conventions/warblerlabs-conventions.yml
- type: Conformance
  url: conformance/warblerlabs-conformance.yml
- type: MCPServer
  url: mcp/warblerlabs-mcp.yml
- type: VulnerabilityDisclosure
  url: security/warblerlabs-vulnerability-disclosure.yml
- type: Security
  url: https://dev.goldfinch.finance/docs/security/bug-bounty/
- type: DomainSecurity
  url: security/warblerlabs-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 5
  pass: local-v1