Warbler Labs Incorporated

Warbler Labs is the San Francisco-based software company founded in 2020 by former Coinbase engineers Blake West and Mike Sall that builds and maintains Goldfinch, a decentralized credit protocol on Ethereum for stablecoin lending to real-world borrowers without crypto collateral, and UID (Unique Identity), a KYC/KYB-compliant on-chain identity credential. Warbler Labs is the core development team behind the Goldfinch protocol, its smart contracts, oracles, and subgraph data layer, and publishes developer documentation for building on and integrating with the protocol. The company is backed by Andreessen Horowitz (a16z), Coinbase Ventures, IDEO CoLab, Kindred Ventures, and others, and was surfaced through the a16z portfolio. Its developer surface is primarily on-chain (Solidity smart contracts, The Graph subgraph for querying protocol data, and the UID credential) rather than a hosted REST API.

Warbler Labs Incorporated is profiled on the APIs.io network. Tagged areas include Company, DeFi, Blockchain, Crypto, and Lending.

Warbler Labs Incorporated’s developer surface includes documentation, getting-started guide, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.7/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company DeFi Blockchain Crypto Lending Credit Ethereum Web3 Smart Contracts Identity Stablecoins

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 12.7/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 6.7 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

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

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.

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Security Posture 1

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

Warbler Labs Incorporated Domain Security

DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: warbler-labs-incorporated
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/warbler-labs-incorporated.png
name: Warbler Labs Incorporated
description: Warbler Labs is the San Francisco-based software company founded in 2020 by former Coinbase engineers Blake West
  and Mike Sall that builds and maintains Goldfinch, a decentralized credit protocol on Ethereum for stablecoin lending to
  real-world borrowers without crypto collateral, and UID (Unique Identity), a KYC/KYB-compliant on-chain identity credential.
  Warbler Labs is the core development team behind the Goldfinch protocol, its smart contracts, oracles, and subgraph data
  layer, and publishes developer documentation for building on and integrating with the protocol. The company is backed by
  Andreessen Horowitz (a16z), Coinbase Ventures, IDEO CoLab, Kindred Ventures, and others, and was surfaced through the a16z
  portfolio. Its developer surface is primarily on-chain (Solidity smart contracts, The Graph subgraph for querying protocol
  data, and the UID credential) rather than a hosted REST API.
url: https://raw.githubusercontent.com/api-evangelist/warbler-labs-incorporated/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- Coinbase Ventures
- IDEO CoLab
- Kindred Ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- DeFi
- Blockchain
- Crypto
- Lending
- Credit
- Ethereum
- Web3
- Smart Contracts
- Identity
- Stablecoins
tags_raw:
- Company
- DeFi
- Blockchain
- Crypto
- Lending
- Credit
- Ethereum
- Web3
- Smart Contracts
- Identity
- Stablecoin
apis: []
common:
- type: DomainSecurity
  url: security/warbler-labs-incorporated-domain-security.yml
- type: Website
  url: https://www.warblerlabs.com/
- type: DeveloperPortal
  url: https://dev.goldfinch.finance/
- type: Documentation
  url: https://docs.goldfinch.finance/
- type: GettingStarted
  url: https://dev.goldfinch.finance/docs/intro
- type: GitHubOrganization
  url: https://github.com/warbler-labs
- type: Blog
  url: https://goldfinch.substack.com/
- type: LLMsTxt
  url: llms/warbler-labs-incorporated-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 2
  pass: local-v1

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