Rain (Raincards)

Rain is a stablecoin payments infrastructure company that lets platforms, fintechs, and institutions issue cards, open virtual accounts and wallets, and move money globally through a single API. Its issuing platform turns self-custodied stablecoin collateral and digital-dollar balances into Visa/Mastercard-accepted spending at over 175 million merchant locations, connecting blockchain settlement rails to traditional card networks. Products include card issuing, corporate/spend cards, virtual accounts, onramps and offramps, and cross-border payment processing. Rain is a Mastercard Principal Member and is backed by Norwest Venture Partners, Sapphire Ventures, Lightspeed, and Coinbase Ventures. The public developer surface is a gated Mintlify documentation portal at docs.rain.xyz covering the Rain Issuing API; the OpenAPI/Swagger reference is behind login and not publicly retrievable.

Rain (Raincards) is profiled on the APIs.io network. Tagged areas include Company, Payments, Stablecoins, Card Issuing, and Fintech Infrastructure.

Rain (Raincards)’s developer surface includes documentation, engineering blog, support, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

24.9/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyPaymentsStablecoinsCard IssuingFintech InfrastructureGlobal Money MovementWalletsWeb3 FinanceCross-Border Payments

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 24.9/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 4.8 / 20

Commercial Clarity 8.4 / 20

Operational Transparency 2.1 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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/raincards: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

TrustCenter

TrustCenter

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: raincards
name: Rain (Raincards)
description: Rain is a stablecoin payments infrastructure company that lets platforms, fintechs, and institutions issue cards,
  open virtual accounts and wallets, and move money globally through a single API. Its issuing platform turns self-custodied
  stablecoin collateral and digital-dollar balances into Visa/Mastercard-accepted spending at over 175 million merchant locations,
  connecting blockchain settlement rails to traditional card networks. Products include card issuing, corporate/spend cards,
  virtual accounts, onramps and offramps, and cross-border payment processing. Rain is a Mastercard Principal Member and is
  backed by Norwest Venture Partners, Sapphire Ventures, Lightspeed, and Coinbase Ventures. The public developer surface is
  a gated Mintlify documentation portal at docs.rain.xyz covering the Rain Issuing API; the OpenAPI/Swagger reference is behind
  login and not publicly retrievable.
url: https://raw.githubusercontent.com/api-evangelist/raincards/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.rain.xyz/favicon.ico
tags:
- Company
- Payments
- Stablecoins
- Card Issuing
- Fintech Infrastructure
- Global Money Movement
- Wallets
- Web3 Finance
- Cross-Border Payments
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/raincards-domain-security.yml
- type: Website
  url: https://www.rain.xyz
- type: DeveloperPortal
  url: https://docs.rain.xyz
- type: Documentation
  url: https://docs.rain.xyz
- type: Blog
  url: https://www.rain.xyz/blog
- type: Support
  url: https://www.rain.xyz/contact-us
- type: Login
  url: https://use.rain.xyz
- type: StatusPage
  url: https://status.rain.xyz
- type: TrustCenter
  url: https://trust.rain.xyz
- type: TermsOfService
  url: https://www.rain.xyz/legal-center/legal
- type: PrivacyPolicy
  url: https://legal.raincards.xyz/legal/privacy-policy
- type: Lifecycle
  url: lifecycle/raincards-lifecycle.yml
- type: LLMsTxt
  url: llms/raincards-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 3
  pass: local-v1