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Stripe API-First

Stripe's methodology treats APIs as products and documentation as a first-class deliverable. This approach emphasizes contract-first design, developer empathy, and precision in specifications.

The Flow

Stripe API-First Flow

Key Principles

  1. Contract-First: API design precedes implementation
  2. Docs as Product: Documentation is a first-class product
  3. Developer Empathy: Specs from the API consumer's perspective
  4. Precision: No ambiguity in inputs, outputs, errors
  5. Consistency: Predictable patterns across the API surface
  6. Externally Legible: Readable by external developers

VisionSpec Mapping

Stripe Artifact VisionSpec Type Purpose
Platform Strategy MRD Developer market and ecosystem
API Product Requirements PRD Developer journeys and use cases
API Specification TRD Contract definition (OpenAPI-style)
Developer Experience Spec UXD Onboarding, SDKs, documentation

Using the Stripe Profile

Initialize a Project

multispec init payments-api --profile stripe

Create Platform Strategy (MRD)

multispec draft mrd -p payments-api

The Platform Strategy template includes:

  • Developer market sizing (TAM/SAM/SOM)
  • Developer personas and segments
  • Competitive landscape
  • Business model and monetization
  • Go-to-market strategy

Create API PRD

multispec draft prd -p payments-api

The API PRD template includes:

  • Developer personas and priorities
  • Developer journeys (Time to Hello World)
  • Functional requirements
  • Integration patterns
  • Error handling requirements
  • SDK requirements
  • Success metrics

Synthesize API Specification (TRD)

multispec synthesize trd -p payments-api

The API Specification template includes:

  • Resource definitions
  • Endpoint documentation
  • Request/response schemas
  • Error codes with remediation
  • Pagination
  • Idempotency
  • Versioning strategy
  • Webhook events

Create Developer Experience Spec (UXD)

multispec draft uxd -p payments-api

The DX Spec template includes:

  • Onboarding journey (< 15 min to first call)
  • Documentation architecture
  • SDK design principles
  • Error experience quality
  • Interactive tools (API explorer, webhook tester)
  • DX metrics

Rubric Categories

Platform Strategy Evaluation (MRD)

Category Weight Description
Developer Market 20% Market clearly defined and sized
Competitive Position 15% Differentiation clear and defensible
Platform Strategy 20% Ecosystem thinking present
Business Model 15% Monetization and unit economics
Go-to-Market 15% Developer acquisition strategy
Success Metrics 10% Platform success measurable
Roadmap/Investment 5% Phased approach justified

API PRD Evaluation

Category Weight Description
Developer Personas 15% Audience clearly segmented
Developer Journeys 20% Integration paths mapped
Use Case Clarity 20% Specific and prioritized
Integration Patterns 15% Sync, async, webhook defined
Error Experience 15% Error handling from dev perspective
SDK Requirements 10% Languages and features defined
Success Metrics 5% Developer success measurable

API Specification Evaluation (TRD)

Category Weight Description
Contract Clarity 25% Precise, unambiguous contracts
Consistency 20% Predictable patterns throughout
Error Documentation 20% Every error with remediation
Resource Modeling 15% Clear relationships
Versioning Strategy 10% Breaking change policy
Idempotency/Safety 5% Safe retry behavior
Rate Limiting 5% Limits documented

DX Spec Evaluation (UXD)

Category Weight Description
Onboarding Journey 25% < 15 min to first call
Documentation Architecture 20% Well-structured information
Documentation Standards 20% Quality requirements defined
SDK Design 15% Principles and coverage
Error Experience 10% Errors help developers succeed
Interactive Tools 5% API explorer, webhook tester
DX Metrics 5% Experience measurable

Example Workflow

# 1. Initialize project
multispec init billing-api --profile stripe

# 2. Define Platform Strategy
multispec draft mrd -p billing-api
multispec eval mrd -p billing-api
multispec approve mrd -p billing-api

# 3. Define API Product Requirements
multispec draft prd -p billing-api
multispec eval prd -p billing-api
multispec approve prd -p billing-api

# 4. Synthesize API Specification
multispec synthesize trd -p billing-api
multispec eval trd -p billing-api
multispec approve trd -p billing-api

# 5. Define Developer Experience
multispec draft uxd -p billing-api
multispec eval uxd -p billing-api
multispec approve uxd -p billing-api

# 6. Check status
multispec status -p billing-api

# 7. Export for implementation
multispec export speckit -p billing-api

API Design Patterns

The Stripe profile encourages these patterns:

Human-Readable IDs

ch_1234567890   (charge)
cus_abcdefghij  (customer)
pi_xyz123       (payment intent)

Idempotency Keys

curl https://api.example.com/v1/charges \
  -H "Idempotency-Key: unique-key-12345"

Expandable Objects

curl https://api.example.com/v1/charges/ch_xxx \
  -d "expand[]"=customer

Consistent Error Format

{
  "error": {
    "type": "invalid_request_error",
    "code": "parameter_missing",
    "message": "Required parameter 'amount' is missing",
    "param": "amount",
    "doc_url": "https://docs.example.com/errors#parameter_missing"
  }
}

Reference Materials

For deeper understanding of Stripe's API-first approach, see: