Sift

Sift is a digital trust and safety platform that uses machine learning to detect and prevent online fraud and abuse - payment fraud, account takeover, account abuse, content abuse, and promotion abuse. Applications stream user events to the Sift Events API, retrieve real-time risk Sift Scores (0-100) per abuse type, and act on them through the Decisions API, automated Workflows, verification (OTP), and PSP merchant risk management. Sift exposes a documented public REST API over HTTPS at https://api.sift.com with API-key authentication.

Sift publishes 7 APIs on the APIs.io network, including Decisions API, Events API, Labels API, and 4 more. Tagged areas include Fraud Detection, Fraud Prevention, Risk, Trust and Safety, and Machine-Learning.

Sift’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
37.6/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2
AccessEnterpriseSelf serve
1 APIs
Fraud DetectionFraud PreventionRiskTrust and SafetyMachine-LearningPayment FraudAccount TakeoverChargebacksDigital Trust

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2
Composite quality — 37.6/100 · thin
Contract Quality 12.1 / 21
Developer Ergonomics 5.3 / 17
Access Clarity 6.7 / 17
Operational Transparency 3.8 / 11
Contract Governance 0.0 / 10
Discoverability 5.8 / 9
Regulatory Posture 2.8 / 15
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 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 Surface 0 / 5
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.
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/.
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/sift: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

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

Sift Decisions API

Apply and retrieve decisions against users, orders, sessions, and content.

Sift Events API

Stream user activity to Sift's machine learning models.

Sift Labels API

Legacy API for labeling users to train models.

Sift PSP Merchant Management API

Manage sub-merchant profiles for payment service providers.

Sift Score API

Retrieve real-time Sift Scores per abuse type.

Sift Verification API

One-time passcode (OTP) step-up verification.

Sift Workflows API

Retrieve the status and results of Sift Workflow runs.

Scroll for all 7

Open Collections 9

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

API Collection

OPEN COLLECTION

Sift Decisions API

OPEN COLLECTION

Sift Decisions Events API

OPEN COLLECTION

Sift Decisions Labels API

OPEN COLLECTION

Sift Decisions PSP Merchant Management API

OPEN COLLECTION

Sift Decisions Score API

OPEN COLLECTION

Sift Decisions Verification API

OPEN COLLECTION

Sift Decisions Workflows API

OPEN COLLECTION

Sift API

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Sift Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sift Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sift Finops

FINOPS

Security Posture 2

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

Sift Authentication

http · 1 scheme

SECURITY

Sift Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Sift Agentic Access

20 operations · 13 acting

20 operations · 13 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: sift
url: https://raw.githubusercontent.com/api-evangelist/sift/refs/heads/main/apis.yml
name: Sift
kind: company
description: Sift is a digital trust and safety platform that uses machine learning to detect and prevent online fraud and
  abuse - payment fraud, account takeover, account abuse, content abuse, and promotion abuse. Applications stream user events
  to the Sift Events API, retrieve real-time risk Sift Scores (0-100) per abuse type, and act on them through the Decisions
  API, automated Workflows, verification (OTP), and PSP merchant risk management. Sift exposes a documented public REST API
  over HTTPS at https://api.sift.com with API-key authentication.
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: enterprise
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Enterprise · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sift.png
tags:
- Fraud Detection
- Fraud Prevention
- Risk
- Trust and Safety
- Machine-Learning
- Payment Fraud
- Account Takeover
- Chargebacks
- Digital Trust
tags_raw:
- Fraud Detection
- Fraud Prevention
- Risk
- Trust and Safety
- Machine Learning
- Payment Fraud
- Account Takeover
- Chargebacks
- Digital Trust
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.23'
apis:
- aid: sift:sift-decisions-api
  name: Sift Decisions API
  description: Apply and retrieve decisions against users, orders, sessions, and content.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Decisions
  properties:
  - type: OpenAPI
    url: openapi/sift-decisions-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-events-api
  name: Sift Events API
  description: Stream user activity to Sift's machine learning models.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/sift-events-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-labels-api
  name: Sift Labels API
  description: Legacy API for labeling users to train models.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Labels
  properties:
  - type: OpenAPI
    url: openapi/sift-labels-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-psp-merchant-management-api
  name: Sift PSP Merchant Management API
  description: Manage sub-merchant profiles for payment service providers.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - PSP Merchant Management
  properties:
  - type: OpenAPI
    url: openapi/sift-psp-merchant-management-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-score-api
  name: Sift Score API
  description: Retrieve real-time Sift Scores per abuse type.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Score
  properties:
  - type: OpenAPI
    url: openapi/sift-score-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-verification-api
  name: Sift Verification API
  description: One-time passcode (OTP) step-up verification.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/sift-verification-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
- aid: sift:sift-workflows-api
  name: Sift Workflows API
  description: Retrieve the status and results of Sift Workflow runs.
  humanURL: https://developers.sift.com/docs/curl/events-api/overview
  baseURL: https://api.sift.com
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/sift-workflows-api-openapi.yml
  - type: Documentation
    url: https://developers.sift.com/docs/curl/events-api/overview
  - type: APIReference
    url: https://developers.sift.com/docs/curl/apis-overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/score-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/decisions-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/workflows-api/workflow-decisions
  - type: Documentation
    url: https://developers.sift.com/docs/curl/labels-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/verification-api/overview
  - type: Documentation
    url: https://developers.sift.com/docs/curl/psp-merchant-management-api/overview
common:
- type: AgenticAccess
  url: agentic-access/sift-agentic-access.yml
- type: DomainSecurity
  url: security/sift-domain-security.yml
- type: Authentication
  url: authentication/sift-authentication.yml
- type: GitHubOrganization
  url: https://github.com/SiftScience
- type: LinkedIn
  url: https://www.linkedin.com/company/sift-science
- type: Website
  url: https://sift.com
- type: Documentation
  url: https://developers.sift.com/docs
- type: Plans
  url: plans/sift-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sift-rate-limits.yml
- type: FinOps
  url: finops/sift-finops.yml
- url: https://sift.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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