Stablesea

Stable Sea is a financial technology platform providing global cash management and liquidity for companies building in stablecoins. The Stable Sea Terminal lets businesses consolidate on-chain and off-chain accounts, settle money across 40+ countries, run fiat-to-stablecoin on/off-ramps for transactions up to $50M, earn yield through tokenized money-market funds, and hold Bitcoin in insured custody. The Stable Sea Terminal API is a bearer-authenticated REST API (OpenAPI 3.1) for managing organizations, liquidity providers and exchange rates, external payment instruments, offerings, quotes, and payout orders — with idempotent writes on all create operations. Surfaced as a Kindred Ventures portfolio company and enriched into the API Evangelist network.

Stablesea publishes 2 API contracts indexed on the APIs.io network: Liquidity Providers API and Organizations API. Tagged areas include Company, Stablecoins, Payments, Cash Management, and Treasury.

The Stablesea catalog on APIs.io includes 1 Spectral governance ruleset.

Stablesea’s developer surface includes documentation, API reference, signup flow, support, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.4/100 thin ▬ flat Agent 27/100 agent aware Front door AI 1/6 silent Heartbeat 94/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Stablecoins Payments Cash Management Treasury Cross-Border Payments Liquidity Fintech On-Off Ramp Cryptocurrency

Kin Score

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

Composite quality — 36.4/100 · thin

Contract Quality 9.1 / 19

Developer Ergonomics 8.1 / 15

Access Clarity 3.2 / 15

Operational Transparency 0.0 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 3.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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

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 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Payments 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 21.1 — up to +15.8 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Contract Quality scores 48.4 — up to +12.9 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/stablesea/apis.yml: open an issue on github.com/api-evangelist/stablesea 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Stablecoins and Tokenization (stablecoin issuers, tokenized assets)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

Stablesea Liquidity Providers API

The Liquidity Providers API from Stablesea — 2 operation(s) for liquidity providers.

Stablesea Organizations API

The Organizations API from Stablesea — 11 operation(s) for organizations.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Stable Sea Terminal Liquidity Providers API

OPEN COLLECTION

Stable Sea Terminal Liquidity Providers Organizations API

OPEN COLLECTION

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

place-payout-order

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Stablesea API Rules

56 rules · 53 errors 1 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Stablesea Terminal Overlay

4 actions · update · stablesea-openapi.json

GENERATED

Security Posture 2

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

Stablesea Authentication

http · 1 scheme

SECURITY

Stablesea Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

X-MCPServerCandidate

X-MCPServerCandidate

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

Careers

Careers

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: stablesea
name: Stablesea
description: Stable Sea is a financial technology platform providing global cash management and liquidity for companies building
  in stablecoins. The Stable Sea Terminal lets businesses consolidate on-chain and off-chain accounts, settle money across
  40+ countries, run fiat-to-stablecoin on/off-ramps for transactions up to $50M, earn yield through tokenized money-market
  funds, and hold Bitcoin in insured custody. The Stable Sea Terminal API is a bearer-authenticated REST API (OpenAPI 3.1)
  for managing organizations, liquidity providers and exchange rates, external payment instruments, offerings, quotes, and
  payout orders — with idempotent writes on all create operations. Surfaced as a Kindred Ventures portfolio company and enriched
  into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/stablesea/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kindred-ventures
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
image: https://framerusercontent.com/images/Z7eNpaGMVcjn2gmGRb3QxFnqnE.png
tags:
- Company
- Stablecoins
- Payments
- Cash Management
- Treasury
- Cross-Border Payments
- Liquidity
- Fintech
- On-Off Ramp
- Cryptocurrency
apis:
- aid: stablesea:stablesea-liquidity-providers-api
  name: Stablesea Liquidity Providers API
  description: The Liquidity Providers API from Stablesea — 2 operation(s) for liquidity providers.
  humanURL: https://www.stablesea.com/developers
  baseURL: https://api-sandbox.stablesea.com/v1
  tags:
  - Liquidity Providers
  properties:
  - type: OpenAPI
    url: openapi/stablesea-liquidity-providers-api-openapi.yml
  - type: Documentation
    url: https://docs.stablesea.com
  - type: APIReference
    url: https://docs.stablesea.com/api-reference
  - type: LLMsTxt
    url: llms/stablesea-llms.txt
  - type: Authentication
    url: authentication/stablesea-authentication.yml
  - type: Conventions
    url: conventions/stablesea-conventions.yml
  - type: Idempotency
    url: conventions/stablesea-conventions.yml
  - type: ErrorCatalog
    url: errors/stablesea-problem-types.yml
  - type: Conformance
    url: conformance/stablesea-conformance.yml
  - type: Sandbox
    url: sandbox/stablesea-sandbox.yml
  - type: DataModel
    url: data-model/stablesea-data-model.yml
- aid: stablesea:stablesea-organizations-api
  name: Stablesea Organizations API
  description: The Organizations API from Stablesea — 11 operation(s) for organizations.
  humanURL: https://www.stablesea.com/developers
  baseURL: https://api-sandbox.stablesea.com/v1
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/stablesea-organizations-api-openapi.yml
  - type: Documentation
    url: https://docs.stablesea.com
  - type: APIReference
    url: https://docs.stablesea.com/api-reference
  - type: LLMsTxt
    url: llms/stablesea-llms.txt
  - type: Authentication
    url: authentication/stablesea-authentication.yml
  - type: Conventions
    url: conventions/stablesea-conventions.yml
  - type: Idempotency
    url: conventions/stablesea-conventions.yml
  - type: ErrorCatalog
    url: errors/stablesea-problem-types.yml
  - type: Conformance
    url: conformance/stablesea-conformance.yml
  - type: Sandbox
    url: sandbox/stablesea-sandbox.yml
  - type: DataModel
    url: data-model/stablesea-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgentSkill
  url: skills/stablesea-place-payout-order.md
- type: X-MCPServerCandidate
  url: mcp/stablesea-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/stablesea-terminal-overlay.yaml
- type: DomainSecurity
  url: security/stablesea-domain-security.yml
- type: Website
  url: https://www.stablesea.com/
- type: DeveloperPortal
  url: https://www.stablesea.com/developers
- type: Documentation
  url: https://docs.stablesea.com
- type: APIReference
  url: https://docs.stablesea.com/api-reference
- type: SignUp
  url: https://app.stablesea.com/signup
- type: Support
  url: https://www.stablesea.com/contact
- type: Blog
  url: https://www.stablesea.com/blog
- type: TermsOfService
  url: https://www.stablesea.com/terms
- type: PrivacyPolicy
  url: https://www.stablesea.com/privacy
- type: Careers
  url: https://careers.stablesea.com/
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 12
  pass: local-v1

Stablesea API — frequently asked questions

Does Stablesea have an API?

Yes. APIs.io lists 2 APIs from Stablesea, including Stablesea Liquidity Providers API and Stablesea Organizations API.

Is there an OpenAPI specification for the Stablesea API?

Yes. APIs.io indexes 2 OpenAPI specifications for Stablesea, each linked for download from this page.

How do I authenticate with the Stablesea API?

Stablesea uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Stablesea Authentication.

Is the Stablesea API ready for AI agents?

Stablesea has a Kin Score of 36.4 out of 100 (thin) and an Agent Readiness score of 26.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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