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 is listed with 4 APIs on the APIs.io network. Tagged areas include Web3, DeFi, Decentralized Exchange, AMM, and Liquidity.

Balancer’s developer surface includes developer portal, documentation, GitHub presence, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

14.1/100 emerging ▬ flat Agent 1/100 human only Heartbeat 62/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

4 APIs

Web3 DeFi Decentralized Exchange AMM Liquidity Multi-Chain GraphQLSmart Order RouterOpen Source

Kin Score

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

Composite quality — 14.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 0.9 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.0 / 10

Discoverability 6.7 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 1/100 · 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 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

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 Securities & Market Data 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

12 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
Access Clarity scores 5.3 — up to +18.9 composite points
Developer Ergonomics scores 26.2 — up to +14.8 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/balancer/apis.yml: open an issue on github.com/api-evangelist/balancer 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 →

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 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

Balancer API pricing

Not yet checked against Balancer's own pricing page. Compiled by API Evangelist on 2026-05-08 from docs.balancer.fi/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Public GraphQL API (Free) open	Free
On-chain (gas + swap fee) usage	—

Plan details, limits and sources →

Rate limits

Public GraphQL API (fair use): 10 requests per second
Subgraph (via The Graph): unlimited requests per second

Compiled by API Evangelist, not yet checked against Balancer's documentation. Rate-limit details →

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 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

aid: balancer
url: https://raw.githubusercontent.com/api-evangelist/balancer/refs/heads/main/apis.yml
name: Balancer
kind: protocol
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - balancer/api
    - balancer/b-sdk
    - balancer/balancer-v2-monorepo
  open_source: unknown
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/balancer.png
tags:
- Web3
- DeFi
- Decentralized Exchange
- AMM
- Liquidity
- Multi-Chain
- GraphQL
- Smart Order Router
- Open Source
tags_raw:
- Web3
- DeFi
- DEX
- AMM
- Liquidity
- Multi-chain
- GraphQL
- Smart Order Router
- Open Source
- Open-Source
created: '2026-05-08'
modified: '2026-09-16'
specificationVersion: '0.23'
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
  - Swap
  - Liquidity
  - Analytics
  tags_raw:
  - 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
  - Onchain
  - Vault
  - Router
  tags_raw:
  - 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: Website
  url: https://balancer.fi
- 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

Balancer API — frequently asked questions

Does Balancer have an API?

Yes. APIs.io lists 4 APIs from Balancer, including Balancer GraphQL API, Balancer Subgraph and Balancer SOR SDK, and 1 more.

How much does the Balancer API cost?

APIs.io lists 2 pricing plans for Balancer, with each plan's price, limits and inclusions under Pricing on this page.

Is the Balancer API ready for AI agents?

Balancer has a Kin Score of 14.1 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.

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