Balancer website screenshot

Balancer

Balancer is a DeFi AMM and programmable liquidity platform supporting weighted, stable, and custom pools (v2 and v3). Balancer publishes a public GraphQL API at api-v3.balancer.fi for pool, swap, and analytics data, plus per-chain subgraph endpoints. Smart-contract entry points (Vault and Router) are the primary write surface; SDKs wrap the SOR (Smart Order Router) for client-side route construction.

Balancer publishes 4 APIs on the APIs.io network. Tagged areas include Web3, DeFi, DEX, AMM, and Liquidity.

Balancer’s developer surface includes developer portal, documentation, GitHub presence, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
20.5/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
4 APIs
Web3DeFiDEXAMMLiquidityMulti-chainGraphQLSmart Order RouterOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 20.5/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 3.4 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
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 7 / 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
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/balancer: 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 4

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

Balancer GraphQL API

Public GraphQL API used by the Balancer UI and integrators. Provides pools, tokens, swaps, gauges, voting, and analytics across all supported chains.

Balancer Subgraph

Per-chain GraphQL subgraphs published on The Graph for raw indexed Balancer events.

Balancer SOR SDK

Client-side TypeScript / Solidity SDK for the Balancer Smart Order Router; constructs swap routes against current pool state.

Balancer Smart Contracts

Vault and Router smart contracts where swaps and liquidity actions are executed on-chain. v2 and v3 versions deployed across Ethereum, Arbitrum, Optimism, Polygon, Avalanche, Gn...

GraphQL 1

GraphQL schemas published by this provider.

Balancer GraphQL API

Public GraphQL API used by the Balancer UI and integrators. Provides pools, tokens, swaps, gauges, voting, and analytics across all supported chains.

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Balancer Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Balancer Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Balancer Finops

FINOPS

Security Posture 1

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

Balancer Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Forums
Forums
 RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: balancer
url: https://raw.githubusercontent.com/api-evangelist/balancer/refs/heads/main/apis.yml
name: Balancer
kind: protocol
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/balancer.png
tags:
- Web3
- DeFi
- DEX
- AMM
- Liquidity
- Multi-chain
- GraphQL
- Smart Order Router
- Open Source
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
description: Balancer is a DeFi AMM and programmable liquidity platform supporting weighted, stable, and custom pools (v2
  and v3). Balancer publishes a public GraphQL API at api-v3.balancer.fi for pool, swap, and analytics data, plus per-chain
  subgraph endpoints. Smart-contract entry points (Vault and Router) are the primary write surface; SDKs wrap the SOR (Smart
  Order Router) for client-side route construction.
apis:
- aid: balancer:graphql-api
  name: Balancer GraphQL API
  tags:
  - GraphQL
  - Pools
  - Swaps
  - Liquidity
  - Analytics
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api-v3.balancer.fi/
  humanURL: https://docs.balancer.fi/data-and-analytics/data-and-analytics/api.html
  description: Public GraphQL API used by the Balancer UI and integrators. Provides pools, tokens, swaps, gauges, voting,
    and analytics across all supported chains.
  properties:
  - type: Documentation
    url: https://docs.balancer.fi/data-and-analytics/data-and-analytics/api.html
  - type: GitHub
    url: https://github.com/balancer/api
  - url: graphql/balancer-graphql.md
    type: GraphQL
  x-features:
  - GraphQL across all chains in one endpoint
  - Pool, swap, and gauge schema
  - Powers the Balancer UI
  x-use-cases:
  - Indexing Balancer liquidity for analytics
  - Building Balancer dashboards
  - Sourcing pool APRs
- aid: balancer:subgraph
  name: Balancer Subgraph
  tags:
  - Subgraph
  - The Graph
  - Indexer
  - GraphQL
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.thegraph.com/subgraphs/name/balancer-labs
  humanURL: https://docs.balancer.fi/data-and-analytics/data-and-analytics/subgraph.html
  description: Per-chain GraphQL subgraphs published on The Graph for raw indexed Balancer events.
  properties:
  - type: Documentation
    url: https://docs.balancer.fi/data-and-analytics/data-and-analytics/subgraph.html
  x-features:
  - Per-chain GraphQL subgraph
  - Raw event-level indexing
  x-use-cases:
  - Custom analytics
  - Reconciling on-chain to off-chain data
- aid: balancer:sor-sdk
  name: Balancer SOR SDK
  tags:
  - SDK
  - Smart Order Router
  - Solidity
  - JavaScript
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://github.com/balancer/b-sdk
  humanURL: https://docs.balancer.fi/integration-guides/swapping/swaps-with-sor-sdk.html
  description: Client-side TypeScript / Solidity SDK for the Balancer Smart Order Router; constructs swap routes against current
    pool state.
  properties:
  - type: Documentation
    url: https://docs.balancer.fi/integration-guides/swapping/swaps-with-sor-sdk.html
  - type: GitHub
    url: https://github.com/balancer/b-sdk
  x-features:
  - Client-side SOR
  - Multihop swap routing
  - Built-in gas estimation
  x-use-cases:
  - Aggregator integrations
  - Custom swap UIs
- aid: balancer:smart-contracts
  name: Balancer Smart Contracts
  tags:
  - Smart Contracts
  - On-chain
  - Vault
  - Router
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://etherscan.io/address/balancer.fi
  humanURL: https://docs.balancer.fi/concepts/vault/
  description: Vault and Router smart contracts where swaps and liquidity actions are executed on-chain. v2 and v3 versions
    deployed across Ethereum, Arbitrum, Optimism, Polygon, Avalanche, Gnosis, etc.
  properties:
  - type: Documentation
    url: https://docs.balancer.fi/concepts/vault/
  - type: GitHub
    url: https://github.com/balancer/balancer-v2-monorepo
  x-features:
  - Vault architecture
  - Weighted, Stable, Composable Stable, Custom pools
  - veBAL governance
  x-use-cases:
  - Direct pool execution
  - Liquidity provisioning
common:
- type: DomainSecurity
  url: security/balancer-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/balancer-labs
- type: Portal
  url: https://balancer.fi/
- type: Documentation
  url: https://docs.balancer.fi/
- type: GitHub
  url: https://github.com/balancer
- type: Forums
  url: https://forum.balancer.fi/
- type: Plans
  url: plans/balancer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/balancer-rate-limits.yml
- type: FinOps
  url: finops/balancer-finops.yml
- type: LlmsText
  url: https://docs.balancer.fi/llms.txt
- url: https://medium.com/feed/balancer-protocol
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com