Fluent Bit

Fluent Bit is an open source lightweight log processor and forwarder for collecting, parsing, and routing logs and metrics at scale. It exposes an embedded HTTP monitoring server with v1 and v2 endpoints for build info, uptime, internal metrics (JSON, Prometheus, cmetrics), storage stats, health checks, and hot reload.

Fluent Bit publishes 6 APIs on the APIs.io network, including Build API, Health API, Metrics API, and 3 more. Tagged areas include Logging, Observability, Metrics, and Open Source.

Fluent Bit’s developer surface includes documentation, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

31.6/100 thin ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

6 APIs

LoggingObservabilityMetricsOpen Source

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 31.6/100 · thin

Contract Quality 10.0 / 25

Developer Ergonomics 3.0 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.1 / 13

Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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/fluent-bit: 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 6

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

Rate Limits 1

Documented rate limits and quota policies.

Fluent Bit Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

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

GitHubRepository

GitHubRepository

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Slack

Slack

Community

Community

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: fluent-bit
name: Fluent Bit
description: Fluent Bit is an open source lightweight log processor and forwarder for collecting, parsing, and routing logs
  and metrics at scale. It exposes an embedded HTTP monitoring server with v1 and v2 endpoints for build info, uptime, internal
  metrics (JSON, Prometheus, cmetrics), storage stats, health checks, and hot reload.
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/fluent-bit.png
tags:
- Logging
- Observability
- Metrics
- Open Source
url: https://raw.githubusercontent.com/api-evangelist/fluent-bit/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: fluent-bit:fluent-bit-build-api
  name: Fluent Bit Build API
  description: The Build API from Fluent Bit — 1 operation(s) for build.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Build
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-build-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
- aid: fluent-bit:fluent-bit-health-api
  name: Fluent Bit Health API
  description: The Health API from Fluent Bit — 2 operation(s) for health.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-health-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
- aid: fluent-bit:fluent-bit-metrics-api
  name: Fluent Bit Metrics API
  description: The Metrics API from Fluent Bit — 4 operation(s) for metrics.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-metrics-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
- aid: fluent-bit:fluent-bit-reload-api
  name: Fluent Bit Reload API
  description: The Reload API from Fluent Bit — 1 operation(s) for reload.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Reload
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-reload-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
- aid: fluent-bit:fluent-bit-storage-api
  name: Fluent Bit Storage API
  description: The Storage API from Fluent Bit — 1 operation(s) for storage.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Storage
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-storage-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
- aid: fluent-bit:fluent-bit-uptime-api
  name: Fluent Bit Uptime API
  description: The Uptime API from Fluent Bit — 1 operation(s) for uptime.
  humanURL: https://docs.fluentbit.io/manual/administration/monitoring
  baseURL: http://127.0.0.1:2020
  tags:
  - Uptime
  properties:
  - type: OpenAPI
    url: openapi/fluent-bit-uptime-api-openapi.yml
  - type: Documentation
    url: https://docs.fluentbit.io/manual/administration/monitoring
common:
- type: AgenticAccess
  url: agentic-access/fluent-bit-agentic-access.yml
- type: DomainSecurity
  url: security/fluent-bit-domain-security.yml
- type: Website
  url: https://fluentbit.io
- type: Documentation
  url: https://docs.fluentbit.io
- type: GitHubRepository
  url: https://github.com/fluent/fluent-bit
- type: Slack
  url: https://launchpass.com/fluent-all
- type: Community
  url: https://fluentbit.io/community/
- type: Integrations
  url: https://fluentbit.io/integrations
- url: https://fluentbit.io/blog/index.xml
  type: Blog
integrations:
- name: Fluentbit, High Performance
- name: slack
- name: An End to End
- name: how it works
- name: G cloud
- name: microsoft
- name: aws
- name: digital ocean
- name: cisco
- name: new relic
- name: sumo logic
- name: logiq
- name: trend
- name: datadog
- name: logdna
- name: lyft
- name: couchbase
- name: humio
- name: linkedin
- name: vmware
- name: wallmart
- name: transit
- name: splunk
- name: gaintswarm
- name: WSO2
- name: qualtrics
- name: swyft
- name: dell
- name: swym
- name: gm
- name: Scalable}
- name: Flexible}
- name: Efficient}
- name: Extensible}
- name: Event-Driven Architecture
- name: Dynamic Routing
- name: Flexible Configuration
- name: Robust I/O Handler
- name: Upstream Manager
- name: Security & TLS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Fluent Bit

Kin Score

APIs 6

Fluent Bit Build API

Fluent Bit Health API

Fluent Bit Metrics API

Fluent Bit Reload API

Fluent Bit Storage API

Fluent Bit Uptime API

Open Collections 1

Fluent Bit Monitoring HTTP API

Pricing Plans 1

Fluent Bit Plans Pricing

Rate Limits 1

Fluent Bit Rate Limits

FinOps 1

Fluent Bit Finops

Security Posture 1

Fluent Bit Domain Security

Agentic Access 1

Fluent Bit Agentic Access

Resources