Polly website screenshot

Polly

Polly is a .NET resilience and transient-fault-handling library that allows developers to express resilience strategies such as Retry, Circuit Breaker, Hedging, Timeout, Rate Limiter, and Fallback in a fluent and thread-safe manner. A .NET Foundation member project.

Polly publishes 1 API on the APIs.io network. Tagged areas include .NET, C#, Circuit Breaker, Fault Tolerance, and Microservices.

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

Polly’s developer surface includes documentation, GitHub presence, release notes, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
31.8/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
.NETC#Circuit BreakerFault ToleranceMicroservicesRate LimiterResilienceRetryTimeout

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 31.8/100 · thin
Contract Quality 2.4 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 6.8 / 13
Governance 7.0 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
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 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
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/polly: 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 1

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

Polly

Polly is a .NET resilience and transient-fault-handling library that allows developers to express resilience strategies such as Retry, Circuit Breaker, Hedging, Timeout, Rate Li...

Pricing Plans 1

Published pricing tiers and plan structures.

Polly Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Polly Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Polly Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Polly API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Polly Resilience Pipeline Configuration

1 properties

JSON SCHEMA

Security Posture 1

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

Polly Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Issues
Issues
 ReleaseNotes
ReleaseNotes

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Other 1

Properties that don't map to a standard resource type

NuGet
NuGet

Source (apis.yml)

apis.yml Raw ↑ 
aid: polly
name: Polly
description: Polly is a .NET resilience and transient-fault-handling library that allows developers to express resilience
  strategies such as Retry, Circuit Breaker, Hedging, Timeout, Rate Limiter, and Fallback in a fluent and thread-safe manner.
  A .NET Foundation member project.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/polly.png
tags:
- .NET
- C#
- Circuit Breaker
- Fault Tolerance
- Microservices
- Rate Limiter
- Resilience
- Retry
- Timeout
url: https://raw.githubusercontent.com/api-evangelist/polly/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-03-26'
specificationVersion: '0.19'
apis:
- aid: polly:polly
  name: Polly
  description: Polly is a .NET resilience and transient-fault-handling library that allows developers to express resilience
    strategies such as Retry, Circuit Breaker, Hedging, Timeout, Rate Limiter, and Fallback in a fluent and thread-safe manner.
  humanURL: https://www.thepollyproject.org
  tags:
  - .NET
  - C#
  - Circuit Breaker
  - Fault Tolerance
  - Microservices
  - Rate Limiter
  - Resilience
  - Retry
  - Timeout
  properties:
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/polly/refs/heads/main/json-schema/resilience-pipeline-configuration.json
common:
- type: DomainSecurity
  url: security/polly-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/pollyex
- type: Website
  url: https://www.thepollyproject.org
- type: Documentation
  url: https://www.pollydocs.org/
- type: GitHub
  url: https://github.com/App-vNext/Polly
- type: NuGet
  url: https://www.nuget.org/packages/Polly
- type: Issues
  url: https://github.com/App-vNext/Polly/issues
- type: ReleaseNotes
  url: https://github.com/App-vNext/Polly/releases
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com