Filament

Filament (Filament Finance) is a hybrid on-chain perpetual / derivatives DEX built on the Sei Network. It pairs an off-chain orderbook with a Compartment-Based (COMB) liquidity pool to deliver deep liquidity even in thin markets, offering up to 30x leverage on crypto perpetuals using USDC collateral and oracle-based mark prices. Filament Pro is the flagship trading platform, and the project exposes a signature-authenticated REST + WebSocket order-book API at orderbook.filament.finance for market makers and programmatic traders. The team draws on experience from Goldman Sachs, BlackRock, Persistence, and Nethermind; the protocol's smart contracts were audited by PeckShield. Added to the API Evangelist network as a portfolio-lead stub and enriched from the provider's public documentation.

Filament publishes 1 API on the APIs.io network. Tagged areas include Company, Crypto, DeFi, Derivatives, and Perpetuals.

The Filament catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Filament’s developer surface includes documentation, API reference, getting-started guide, engineering blog, sandbox, authentication, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

24.9/100 emerging ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

1 APIs 1 MCP Servers

CompanyCryptoDeFiDerivativesPerpetualsDEXTradingBlockchainSEIWeb3

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 24.9/100 · emerging

Contract Quality 9.4 / 21

Developer Ergonomics 7.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 6.5 / 9

Regulatory Posture 3.0 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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.

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/.

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/filament: 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 1

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

Filament API

Signature-authenticated REST + WebSocket order-book API for the Filament perpetual DEX on Sei. Place limit/market orders, cancel orders, manage isolated collateral, set TP/SL, r...

MCP Servers 1

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

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Lifecycle

Lifecycle

DataModel

DataModel

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

SecurityAudit

SecurityAudit

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

BrandKit

BrandKit

Source (apis.yml)

aid: filament
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/filament.png
name: Filament
description: Filament (Filament Finance) is a hybrid on-chain perpetual / derivatives DEX built on the Sei Network. It pairs
  an off-chain orderbook with a Compartment-Based (COMB) liquidity pool to deliver deep liquidity even in thin markets, offering
  up to 30x leverage on crypto perpetuals using USDC collateral and oracle-based mark prices. Filament Pro is the flagship
  trading platform, and the project exposes a signature-authenticated REST + WebSocket order-book API at orderbook.filament.finance
  for market makers and programmatic traders. The team draws on experience from Goldman Sachs, BlackRock, Persistence, and
  Nethermind; the protocol's smart contracts were audited by PeckShield. Added to the API Evangelist network as a portfolio-lead
  stub and enriched from the provider's public documentation.
url: https://raw.githubusercontent.com/api-evangelist/filament/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
x-chain: sei
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Crypto
- DeFi
- Derivatives
- Perpetuals
- DEX
- Trading
- Blockchain
- SEI
- Web3
tags_raw:
- Company
- Crypto
- DeFi
- Derivatives
- Perpetuals
- DEX
- Trading
- Blockchain
- Sei
- Web3
apis:
- name: Filament API
  description: Signature-authenticated REST + WebSocket order-book API for the Filament perpetual DEX on Sei. Place limit/market
    orders, cancel orders, manage isolated collateral, set TP/SL, read tradable assets with mark/spot/funding, and stream
    order-book state and order updates over WebSocket. Orders are authenticated by signing the order id with an ethers.js
    wallet (no API keys).
  humanURL: https://docs.filament.finance/market-makers/filament-api
  baseURL: https://orderbook.filament.finance/sei
  tags:
  - Perpetuals
  - Trading
  - Order Book
  - Derivatives
  tags_raw:
  - Perpetuals
  - Trading
  - Orderbook
  - Derivatives
  properties:
  - type: Authentication
    url: authentication/filament-authentication.yml
  - type: Conventions
    url: conventions/filament-conventions.yml
  - type: MCPServer
    url: mcp/filament-mcp.yml
  - type: AsyncAPI
    url: asyncapi/filament-orderbook-asyncapi.yml
  - type: Lifecycle
    url: lifecycle/filament-lifecycle.yml
  - type: DataModel
    url: data-model/filament-data-model.yml
  - type: AgentSkill
    url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://filament.finance/
- type: DeveloperPortal
  url: https://docs.filament.finance/
- type: Documentation
  url: https://docs.filament.finance/
- type: APIReference
  url: https://docs.filament.finance/market-makers/filament-api
- type: GettingStarted
  url: https://docs.filament.finance/guides/trading
- type: Blog
  url: https://medium.com/@filament.finance
- type: X
  url: https://twitter.com/FilamentFinance
- type: Sandbox
  url: sandbox/filament-sandbox.yml
- type: Authentication
  url: authentication/filament-authentication.yml
- type: Conventions
  url: conventions/filament-conventions.yml
- type: MCPServer
  url: mcp/filament-mcp.yml
- type: AsyncAPI
  url: asyncapi/filament-orderbook-asyncapi.yml
- type: Lifecycle
  url: lifecycle/filament-lifecycle.yml
- type: DataModel
  url: data-model/filament-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/filament-llms.txt
- type: DomainSecurity
  url: security/filament-domain-security.yml
- type: SecurityAudit
  url: https://docs.filament.finance/resources/security-audits
- type: BrandKit
  url: https://docs.filament.finance/resources/brand-kit
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Filament

Kin Score

APIs 1

Filament API

MCP Servers 1

Filament MCP Server

Event Specifications 1

Filament Orderbook Streaming API

Security Posture 2

Filament Authentication

Filament Domain Security

Resources