Bastion

Bastion is a full-stack, regulated stablecoin infrastructure platform for enterprises and financial institutions. Founded in 2023 and based in Campbell, California by former a16z crypto leaders, Bastion lets companies securely issue, custody, move, and convert USD-backed stablecoins under Bastion's licenses or their own. Its API-first product suite spans a Regulated Wallet API (create unlimited custodial wallets with Cloud HSM and enclave-based key management), stablecoin issuance, on/off-ramps, and payments, plus Compliance-as-a-Service that handles KYC and AML. Bastion Platforms Trust Company, LLC is chartered as a limited purpose trust company by the New York State Department of Financial Services, and Bastion Platforms US, LLC is a registered MSB (NMLS ID 2523302) with broad money-transmitter-license coverage across the United States. Bastion has raised over $40M from a16z crypto, Coinbase Ventures, and others.

Bastion is listed with 1 API on the APIs.io network. Tagged areas include Company, Stablecoins, Payments, Wallets, and Custody.

Bastion’s developer surface includes engineering blog, documentation, API reference, getting-started guide, signup flow, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.4/100 thin ▬ flat Agent 4/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 1 MCP Servers

Company Stablecoins Payments Wallets Custody Web3 Compliance Crypto Infrastructure Financial ServicesOn/Off-RampsStablecoin Issuance

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 31.4/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 8.5 / 17

Operational Transparency 2.9 / 11

Contract Governance 1.9 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

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 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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
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
Developer Ergonomics scores 40.5 — up to +11.9 composite points
Access Clarity scores 50.0 — up to +10.0 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/bastion/apis.yml: open an issue on github.com/api-evangelist/bastion 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)	regulated	19.2 (thin)	-	-

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.

APIs 1

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

Bastion API

Bastion's REST API for regulated stablecoin infrastructure: create and manage custodial wallets, issue and convert stablecoins, run on/off-ramps, and move digital assets, with b...

MCP Servers 1

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

Bastion MCP Server

Remote MCP server at docs.bastion.com over HTTP; 3 tools listed.

MCP SERVER

Security Posture 2

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

Bastion Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Bastion Vulnerability Disclosure

contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conformance

Conformance

Access & Security 5

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Compliance

TrustCenter

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 5

The organization behind the API

Blog

Website

Careers

Twitter

LinkedIn

Source (apis.yml)

aid: bastion
name: Bastion
description: Bastion is a full-stack, regulated stablecoin infrastructure platform for enterprises and financial institutions.
  Founded in 2023 and based in Campbell, California by former a16z crypto leaders, Bastion lets companies securely issue,
  custody, move, and convert USD-backed stablecoins under Bastion's licenses or their own. Its API-first product suite spans
  a Regulated Wallet API (create unlimited custodial wallets with Cloud HSM and enclave-based key management), stablecoin
  issuance, on/off-ramps, and payments, plus Compliance-as-a-Service that handles KYC and AML. Bastion Platforms Trust Company,
  LLC is chartered as a limited purpose trust company by the New York State Department of Financial Services, and Bastion
  Platforms US, LLC is a registered MSB (NMLS ID 2523302) with broad money-transmitter-license coverage across the United
  States. Bastion has raised over $40M from a16z crypto, Coinbase Ventures, and others.
url: https://raw.githubusercontent.com/api-evangelist/bastion/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  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://framerusercontent.com/images/pTrMs5MJstsls9S7X45qlr99Pc.png
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-20
tags:
- Company
- Stablecoins
- Payments
- Wallets
- Custody
- Web3
- Compliance
- Crypto Infrastructure
- Financial Services
- On/Off-Ramps
- Stablecoin Issuance
tags_raw:
- Company
- Stablecoins
- Payments
- Wallets
- Custody
- Web3
- Compliance
- Crypto Infrastructure
- Financial Services
- On/Off-Ramps
- Financial-Services
- Stablecoin Issuance
apis:
- name: Bastion API
  description: 'Bastion''s REST API for regulated stablecoin infrastructure: create and manage custodial wallets, issue and
    convert stablecoins, run on/off-ramps, and move digital assets, with built-in KYC/AML compliance. Backed by Cloud HSM
    and enclave-based key management.'
  humanURL: https://docs.bastion.com/reference
  baseURL: https://api.prod.bastion.com/v2/
  tags:
  - Stablecoins
  - Wallets
  - Payments
  - Custody
  properties:
  - type: Documentation
    url: https://docs.bastion.com/
  - type: APIReference
    url: https://docs.bastion.com/reference
  - type: GettingStarted
    url: https://docs.bastion.com/recipes
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://bastion.com/press
  type: Blog
- type: Website
  url: https://www.bastion.com/
- type: VulnerabilityDisclosure
  url: security/bastion-vulnerability-disclosure.yml
- type: Security
  url: security/bastion-vulnerability-disclosure.yml
- type: DeveloperPortal
  url: https://bastion.com/
- type: Documentation
  url: https://docs.bastion.com/
- type: APIReference
  url: https://docs.bastion.com/reference
- type: GettingStarted
  url: https://docs.bastion.com/recipes
- type: StatusPage
  url: https://status.bastion.com/
- type: Compliance
  url: https://bastion.com/disclosures
- type: TrustCenter
  url: https://bastion.com/subprocessor-list
- type: TermsOfService
  url: https://bastion.com/terms-of-service
- type: PrivacyPolicy
  url: https://bastion.com/privacy-policy
- type: SignUp
  url: https://bastion.com/request-demo
- type: Careers
  url: https://bastion.com/careers
- type: Twitter
  url: https://x.com/Bastion
- type: LinkedIn
  url: https://www.linkedin.com/company/bastionplatforms
- type: Lifecycle
  url: lifecycle/bastion-lifecycle.yml
- type: DomainSecurity
  url: security/bastion-domain-security.yml
- type: Conformance
  url: conformance/bastion-conformance.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Bastion API — frequently asked questions

Does Bastion have an API?

Yes. APIs.io lists 1 API from Bastion, including Bastion API.

Does Bastion have an MCP server?

Yes. APIs.io lists 1 MCP server for Bastion: Remote MCP server at docs.bastion.com over HTTP; 3 tools listed.

Is the Bastion API ready for AI agents?

Bastion has a Kin Score of 31.4 out of 100 (thin) and an Agent Readiness score of 3.5 (human-only), scored by API Evangelist on 2026-10-31.

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