Overlay

Overlay is a decentralized perpetual-futures protocol on BNB Smart Chain (chain id 56) that lets anyone trade and permissionlessly create markets for emerging, pre-CEX, and narrative-driven assets against any verifiable data feed. Positions are synthetic — traders trade against a protocol-managed price feed with USDT/stablecoin collateral rather than an order book — with a dynamic risk engine managing thin markets and zero liquidity requirements. Overlay exposes a public, unauthenticated market-data API (aggregator contracts, contract specs, market catalog, charts price overview), a TypeScript SDK, a GraphQL subgraph, and a provider-published Agent Skill for automated trading. Backed by Polychain.

Overlay publishes 3 APIs on the APIs.io network: Aggregator API, Charts API, and Markets API. Tagged areas include Company, Defi, DeFi, Perpetual Futures, and Derivatives.

Overlay’s developer surface includes documentation, API reference, support, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub
36.2/100 thin ▬ flat Agent 51/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
3 APIs 1 MCP Servers
CompanyDefiDeFiPerpetual FuturesDerivativesTradingMarket DataBNB Smart ChainBlockchainWeb3

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 36.2/100 · thin
Contract Quality 13.2 / 25
Developer Ergonomics 12.2 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 51/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 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/overlay: 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 3

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

Overlay Aggregator API

CoinGecko/CMC-style aggregator market-data feed.

Overlay Charts API

Price overview and OHLC chart data.

Overlay Markets API

Market catalog and metadata.

MCP Servers 1

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

overlay-mcp.yml

MCP SERVER

Security Posture 2

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

Overlay Authentication

none · 1 scheme

SECURITY

Overlay Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

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
 OpenAPI
OpenAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Company 1

The organization behind the API

Website
Website

Other 2

Properties that don't map to a standard resource type

Whitepaper
Whitepaper
 Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: overlay
name: Overlay
description: Overlay is a decentralized perpetual-futures protocol on BNB Smart Chain (chain id 56) that lets anyone trade
  and permissionlessly create markets for emerging, pre-CEX, and narrative-driven assets against any verifiable data feed.
  Positions are synthetic — traders trade against a protocol-managed price feed with USDT/stablecoin collateral rather than
  an order book — with a dynamic risk engine managing thin markets and zero liquidity requirements. Overlay exposes a public,
  unauthenticated market-data API (aggregator contracts, contract specs, market catalog, charts price overview), a TypeScript
  SDK, a GraphQL subgraph, and a provider-published Agent Skill for automated trading. Backed by Polychain.
url: https://raw.githubusercontent.com/api-evangelist/overlay/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/70023182?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- polychain
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Defi
- DeFi
- Perpetual Futures
- Derivatives
- Trading
- Market Data
- BNB Smart Chain
- Blockchain
- Web3
apis:
- aid: overlay:overlay-aggregator-api
  name: Overlay Aggregator API
  description: CoinGecko/CMC-style aggregator market-data feed.
  humanURL: https://docs.overlay.market/api/aggregator-market-data
  baseURL: https://api.overlay.market
  tags:
  - Aggregator
  properties:
  - type: OpenAPI
    url: openapi/overlay-aggregator-api-openapi.yml
  - type: APIReference
    url: https://docs.overlay.market/api/aggregator-market-data
- aid: overlay:overlay-charts-api
  name: Overlay Charts API
  description: Price overview and OHLC chart data.
  humanURL: https://docs.overlay.market/api/aggregator-market-data
  baseURL: https://api.overlay.market
  tags:
  - Charts
  properties:
  - type: OpenAPI
    url: openapi/overlay-charts-api-openapi.yml
  - type: APIReference
    url: https://docs.overlay.market/api/aggregator-market-data
- aid: overlay:overlay-markets-api
  name: Overlay Markets API
  description: Market catalog and metadata.
  humanURL: https://docs.overlay.market/api/aggregator-market-data
  baseURL: https://api.overlay.market
  tags:
  - Markets
  properties:
  - type: OpenAPI
    url: openapi/overlay-markets-api-openapi.yml
  - type: APIReference
    url: https://docs.overlay.market/api/aggregator-market-data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://overlay.market
- type: Documentation
  url: https://docs.overlay.market/
- type: DeveloperPortal
  url: https://docs.overlay.market/
- type: APIReference
  url: https://docs.overlay.market/api/aggregator-market-data
- type: GitHubOrganization
  url: https://github.com/overlay-market
- type: Support
  url: https://redrct.overlay.market/discord
- type: Whitepaper
  url: https://redrct.overlay.market/whitepaper
- type: OpenAPI
  url: openapi/overlay-openapi.yml
- type: Authentication
  url: authentication/overlay-authentication.yml
- type: Conventions
  url: conventions/overlay-conventions.yml
- type: ErrorCatalog
  url: errors/overlay-problem-types.yml
- type: Lifecycle
  url: lifecycle/overlay-lifecycle.yml
- type: Conformance
  url: conformance/overlay-conformance.yml
- type: DataModel
  url: data-model/overlay-data-model.yml
- type: Overlay
  url: overlays/overlay-openapi-overlay.yaml
- type: LLMsTxt
  url: llms/overlay-llms.txt
- type: MCPServer
  url: mcp/overlay-mcp.yml
- type: Packages
  url: packages/overlay-packages.yml
- type: SDKs
  url: packages/overlay-packages.yml
- type: AgentSkill
  url: skills/overlay-market.md
- type: DomainSecurity
  url: security/overlay-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 15
  pass: local-v1