Vegeta

aid: vegeta
name: Vegeta
description: Vegeta is an open source HTTP load testing tool and library written in Go for generating constant request rates
  to measure API performance and reliability under sustained load. Supports CLI and library usage with attack plans, rate
  limiting, duration control, and detailed result metrics including latency histograms and success rates.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Go
- HTTP
- Load Testing
- Performance
- Testing
url: https://raw.githubusercontent.com/api-evangelist/vegeta/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-05-03'
specificationVersion: '0.19'
apis:
- aid: vegeta:vegeta
  name: Vegeta Load Testing Tool
  description: Vegeta is an open source HTTP load testing tool and library written in Go for generating constant request rates.
    Supports targets from files or stdin, rate limiting (req/s), duration control, configurable timeouts, TLS settings, and
    multiple output formats (text, JSON, binary). Produces detailed result metrics including latency histograms, success rates,
    status code distributions, and throughput measurements.
  humanURL: https://github.com/tsenart/vegeta
  tags:
  - Go
  - HTTP
  - Load Testing
  - Performance
  - Testing
  properties:
  - type: Documentation
    url: https://github.com/tsenart/vegeta#readme
  - type: GitHubRepository
    url: https://github.com/tsenart/vegeta
  - type: JSONSchema
    url: json-schema/vegeta-attack-schema.json
    title: Attack Configuration Schema
  - type: JSONSchema
    url: json-schema/vegeta-result-schema.json
    title: Result Schema
  - type: JSONSchema
    url: json-schema/vegeta-metrics-schema.json
    title: Metrics Schema
  - type: JSONStructure
    url: json-structure/vegeta-attack-structure.json
    title: Attack Configuration Structure
  - type: JSONStructure
    url: json-structure/vegeta-result-structure.json
    title: Result Structure
  - type: JSONStructure
    url: json-structure/vegeta-metrics-structure.json
    title: Metrics Structure
  - type: Examples
    url: examples/vegeta-attack-example.json
    title: Attack Configuration Example
  - type: Examples
    url: examples/vegeta-result-example.json
    title: Result Example
  - type: Examples
    url: examples/vegeta-metrics-example.json
    title: Metrics Example
common:
- type: Website
  url: https://github.com/tsenart/vegeta
- type: Documentation
  url: https://github.com/tsenart/vegeta#readme
- type: GitHubOrganization
  url: https://github.com/tsenart
- type: GitHubRepository
  url: https://github.com/tsenart/vegeta
- type: Vocabulary
  url: vocabulary/vegeta-vocabulary.yml
  title: Vegeta Vocabulary
- type: Features
  data:
  - name: Constant Rate Attack
    description: Generates HTTP requests at a constant rate (requests per second) for a specified duration, simulating sustained
      load on API endpoints.
  - name: Multiple Output Formats
    description: Supports text, JSON, and binary result output formats with encoding/decoding support for pipeline-based workflows.
  - name: Latency Histograms
    description: Produces detailed latency histograms with configurable buckets for analyzing p50, p95, p99, and max latency
      distributions.
  - name: Target Formats
    description: Accepts HTTP targets from files or stdin with support for custom headers, request bodies, and per-target
      configuration.
  - name: TLS and Redirects
    description: Configurable TLS settings including certificate pinning, insecure mode, and redirect following for testing
      secured endpoints.
  - name: Library API
    description: Go library (vegeta/lib) for programmatic integration of load testing into test suites, CI/CD pipelines, and
      monitoring tools.
- type: UseCases
  data:
  - name: API Performance Benchmarking
    description: Measure API throughput, latency percentiles, and success rates at various request rates to establish performance
      baselines and SLA compliance.
  - name: Load Testing in CI/CD
    description: Integrate vegeta as a library in Go test suites to run automated load tests as part of continuous integration
      pipelines.
  - name: Capacity Planning
    description: Determine maximum sustainable request rates before latency degradation or error rates exceed acceptable thresholds
      for capacity planning.
  - name: Regression Detection
    description: Compare latency and throughput metrics across API versions to detect performance regressions before deployment
      to production.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com