Hubble Protocol

Hubble Protocol is a Solana-based decentralized finance (DeFi) protocol that lets users borrow the USDH stablecoin against multiple crypto collateral assets (SOL, mSOL, stSOL, ETH, BTC and more) with interest-free, fixed-fee loans held open for unlimited time. The protocol pairs a Stability Vault, a Peg Stability Module, a hybrid liquidation model, and native yield on deposited collateral. Developers integrate with Hubble on-chain through its Anchor programs (IDLs published on GitHub) and the open-source "@hubbleprotocol/hubble-sdk" TypeScript client, which exposes borrowing market states, HBB staking and USDH stability-pool data, user loans, treasury and circulating-supply metrics, and peg-stability swaps. Hubble published security audits (Arcadia, Kudelski, Smart State, Sec3) and runs a funded bug-bounty program; its core contributors later built Kamino Finance.

Hubble Protocol is profiled on the APIs.io network. Tagged areas include Company, Crypto Web3, DeFi, Solana, and Stablecoins.

Hubble Protocol’s developer surface includes documentation, getting-started guide, API reference, support, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.5/100 emerging ▬ flat Agent 0/100 human only library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Crypto Web3 DeFi Solana Stablecoins Lending Borrowing Blockchain SDK

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 16.5/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 9.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 1.7 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

Agent readiness — 0/100 · 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 0 / 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

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.

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Security Posture 2

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

Hubble Protocol Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Hubble Protocol Vulnerability Disclosure

contact published

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: hubble-protocol
name: Hubble Protocol
description: Hubble Protocol is a Solana-based decentralized finance (DeFi) protocol that lets users borrow the USDH stablecoin
  against multiple crypto collateral assets (SOL, mSOL, stSOL, ETH, BTC and more) with interest-free, fixed-fee loans held
  open for unlimited time. The protocol pairs a Stability Vault, a Peg Stability Module, a hybrid liquidation model, and native
  yield on deposited collateral. Developers integrate with Hubble on-chain through its Anchor programs (IDLs published on
  GitHub) and the open-source "@hubbleprotocol/hubble-sdk" TypeScript client, which exposes borrowing market states, HBB staking
  and USDH stability-pool data, user loans, treasury and circulating-supply metrics, and peg-stability swaps. Hubble published
  security audits (Arcadia, Kudelski, Smart State, Sec3) and runs a funded bug-bounty program; its core contributors later
  built Kamino Finance.
url: https://raw.githubusercontent.com/api-evangelist/hubble-protocol/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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://app.hubbleprotocol.io/Hubble-URL-Banner.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Crypto Web3
- DeFi
- Solana
- Stablecoins
- Lending
- Borrowing
- Blockchain
- SDK
tags_raw:
- Company
- Crypto Web3
- DeFi
- Solana
- Stablecoin
- Lending
- Borrowing
- Blockchain
- SDK
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/hubble-protocol-domain-security.yml
- type: Website
  url: https://hubbleprotocol.io
- type: DeveloperPortal
  url: https://docs.hubbleprotocol.io
- type: Documentation
  url: https://docs.hubbleprotocol.io
- type: GettingStarted
  url: https://docs.hubbleprotocol.io/overview
- type: APIReference
  url: https://github.com/hubbleprotocol/hubble-common/blob/master/packages/hubble-sdk/README.md
- type: GitHubOrganization
  url: https://github.com/hubbleprotocol
- type: Support
  url: https://discord.gg/b4XqQbbSBk
- type: Packages
  url: packages/hubble-protocol-packages.yml
- type: SDKs
  url: packages/hubble-protocol-packages.yml
- type: LLMsTxt
  url: llms/hubble-protocol-llms.txt
- type: VulnerabilityDisclosure
  url: security/hubble-protocol-vulnerability-disclosure.yml
- type: Security
  url: security/hubble-protocol-vulnerability-disclosure.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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