Teller Finance

Teller Finance (Teller Protocol) is a decentralized, multi-chain lending and borrowing protocol on Ethereum, Base, Arbitrum, Polygon, and BNB Chain. Borrowers take fixed-APR, time-based loans from isolated lending pools using their tokens as collateral, with no oracle-driven margin-call liquidations, through an open order-book of markets governed by the TellerV2 smart contract. The developer surface is on-chain (Solidity smart contracts) plus a GraphQL subgraph for read-side data and an embeddable Cash Advance widget (npm) that any dapp can drop into its front end - there is no hosted REST API, OAuth server, or API-key program; authentication is wallet-based. Teller was surfaced as a portfolio company of Bessemer Venture Partners and enriched here from its public developer surface.

Teller Finance is profiled on the APIs.io network. Tagged areas include Company, Fintech, DeFi, Lending, and Blockchain.

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

🌐 Visit website 📡 Source on GitHub

10.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyFintechDeFiLendingBlockchainEthereumSmart Contracts

Kin Score

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

Composite quality — 10.9/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 3.5 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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/teller-finance: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Components

Components

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

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: teller-finance
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/teller-finance.png
name: Teller Finance
description: Teller Finance (Teller Protocol) is a decentralized, multi-chain lending and borrowing protocol on Ethereum,
  Base, Arbitrum, Polygon, and BNB Chain. Borrowers take fixed-APR, time-based loans from isolated lending pools using their
  tokens as collateral, with no oracle-driven margin-call liquidations, through an open order-book of markets governed by
  the TellerV2 smart contract. The developer surface is on-chain (Solidity smart contracts) plus a GraphQL subgraph for read-side
  data and an embeddable Cash Advance widget (npm) that any dapp can drop into its front end - there is no hosted REST API,
  OAuth server, or API-key program; authentication is wallet-based. Teller was surfaced as a portfolio company of Bessemer
  Venture Partners and enriched here from its public developer surface.
url: https://raw.githubusercontent.com/api-evangelist/teller-finance/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bessemer-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Fintech
- DeFi
- Lending
- Blockchain
- Ethereum
- Smart Contracts
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.teller.org/
- type: Documentation
  url: https://docs.teller.org/
- type: GitHubOrganization
  url: https://github.com/teller-protocol
- type: Blog
  url: https://medium.com/teller-finance
- type: SourceCode
  url: https://github.com/teller-protocol/teller-protocol-v2
- type: Packages
  url: packages/teller-finance-packages.yml
- type: SDKs
  url: packages/teller-finance-packages.yml
- type: Components
  url: components/teller-finance-components.yml
- type: LLMsTxt
  url: llms/teller-finance-llms.txt
- type: DomainSecurity
  url: security/teller-finance-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1