Grafana Loki

Grafana Loki is Grafana Labs' open source log aggregation system — "like Prometheus, but for logs." Rather than full-text indexing log contents, Loki indexes only a small set of labels per log stream and stores the compressed lines in object storage, which is what makes it cheap to run at scale. It is queried with LogQL, a Prometheus-inspired query language, over an HTTP API that covers ingestion, querying, label and pattern discovery, live tailing over WebSocket, a Prometheus-compatible ruler for alerting and recording rules, and a cancellable log deletion API. Loki accepts native pushes and OpenTelemetry OTLP/HTTP logs, publishes proto3 gRPC service definitions for its push and query paths, and ships a first-party CLI (LogCLI), Helm charts, a Kubernetes operator, and Docker images. It is licensed AGPL-3.0 and self-hosted; the same engine is sold as the managed Grafana Cloud Logs service and as the self-managed Grafana Enterprise Logs distribution.

Grafana Loki publishes 3 APIs on the APIs.io network. Tagged areas include Company, Logs, Logging, Log Aggregation, and Observability.

Grafana Loki’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 37 more developer resources.

🌐 Visit website 📡 Source on GitHub

66.1/100 strong ▬ flat Agent 50/100 agent native Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

3 APIs 1 MCP Servers

Company Logs Logging Log Aggregation Observability Monitoring Open Source LogQL OpenTelemetry Telemetry Kubernetes Cloud-Native

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 66.1/100 · strong

Contract Quality 5.1 / 21

Developer Ergonomics 13.7 / 17

Access Clarity 15.7 / 17

Operational Transparency 9.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.8 / 9

Regulatory Posture 6.8 / 15

Agent readiness — 50/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/grafana-loki: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 3

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

Loki HTTP API

The Grafana Loki HTTP API — 40 documented endpoints for pushing logs (native and OTLP), querying with LogQL over instants and ranges, discovering labels, series, patterns and de...

Grafana Cloud Logs API

Grafana Cloud Logs is the fully managed Grafana Loki service. It serves the same Loki HTTP API on a per-stack host of the form logs-prod-.grafana.net, authenticated wit...

Grafana MCP Server — Loki tools

Grafana Loki reaches MCP clients through the Grafana Labs MCP servers, which register a Loki tool family (query_loki_logs, list_loki_label_names, list_loki_label_values, query_l...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Grafana MCP server (Loki tools)

Grafana Loki does not itself ship an MCP server. The Loki query surface reaches MCP clients through the Grafana Labs MCP servers, which expose Loki as a datasource: the open-sou...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Grafana Loki Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Grafana Loki Rate Limits

14 limits

RATE LIMITS

Security Posture 4

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

Grafana Loki Authentication

6 schemes

SECURITY

Grafana Loki Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Grafana Loki Vulnerability Disclosure

Intigriti · contact published

SECURITY

Grafana Loki Trust Center

SOC 2 Type 2, ISO 27001, PCI DSS, FedRAMP High, GDPR, CSA STAR, EU-US / Swiss-US Data Privacy Framework

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Grafana Loki Scopes

6 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 7

MCP servers, agent skills, and machine-readable catalogs

WellKnown

LLMsTxt

AgentSkill

AgentSkill

AgentSkill

AgentSkill

AgentSkill

Scroll for all 7

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

Idempotency

ErrorCatalog

DataModel

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

CLI

Access & Security 7

Authentication, authorization, and security posture

Security

Compliance

TrustCenter

Authentication

OAuthScopes

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Scroll for all 7

Operate 5

Status, limits, changes, and where to get help

Support

StatusPage

Deprecation

ChangeLog

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

License

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Protobuf

Protobuf

Source (apis.yml)

aid: grafana-loki
name: Grafana Loki
description: Grafana Loki is Grafana Labs' open source log aggregation system — "like Prometheus, but for logs." Rather than
  full-text indexing log contents, Loki indexes only a small set of labels per log stream and stores the compressed lines
  in object storage, which is what makes it cheap to run at scale. It is queried with LogQL, a Prometheus-inspired query language,
  over an HTTP API that covers ingestion, querying, label and pattern discovery, live tailing over WebSocket, a Prometheus-compatible
  ruler for alerting and recording rules, and a cancellable log deletion API. Loki accepts native pushes and OpenTelemetry
  OTLP/HTTP logs, publishes proto3 gRPC service definitions for its push and query paths, and ships a first-party CLI (LogCLI),
  Helm charts, a Kubernetes operator, and Docker images. It is licensed AGPL-3.0 and self-hosted; the same engine is sold
  as the managed Grafana Cloud Logs service and as the self-managed Grafana Enterprise Logs distribution.
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - scopes
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-02'
  method: derived
image: https://grafana.com/media/docs/loki/logo-grafana-loki.png
url: https://raw.githubusercontent.com/api-evangelist/grafana-loki/refs/heads/main/apis.yml
x-type: company
x-source: harvest:self-hosted-agent-stack
specificationVersion: '0.20'
created: '2026-08-27'
modified: '2026-08-27'
tags:
- Company
- Logs
- Logging
- Log Aggregation
- Observability
- Monitoring
- Open Source
- LogQL
- OpenTelemetry
- Telemetry
- Kubernetes
- Cloud-Native
tags_raw:
- Company
- Logs
- Logging
- Log Aggregation
- Observability
- Monitoring
- Open Source
- LogQL
- OpenTelemetry
- Telemetry
- Kubernetes
- Cloud Native
- Open-Source
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: grafana-loki:loki-http-api
  name: Loki HTTP API
  description: The Grafana Loki HTTP API — 40 documented endpoints for pushing logs (native and OTLP), querying with LogQL
    over instants and ranges, discovering labels, series, patterns and detected fields, streaming a live tail over WebSocket,
    managing Prometheus-shaped alerting and recording rule groups, submitting and cancelling log deletion requests, and reading
    component status and ring state. Loki is self-hosted software, so the base host is whichever address the operator binds;
    the documented default port is 3100 and TLS is terminated by the operator or a fronting proxy. Authorization is explicitly
    not part of this API.
  humanURL: https://grafana.com/docs/loki/latest/reference/loki-http-api/
  baseURL: http://{loki-host}:3100
  tags:
  - Logs
  - Logging
  - Observability
  - LogQL
  - OpenTelemetry
  properties:
  - type: Documentation
    url: https://grafana.com/docs/loki/latest/
  - type: APIReference
    url: https://grafana.com/docs/loki/latest/reference/loki-http-api/
  - type: GettingStarted
    url: https://grafana.com/docs/loki/latest/get-started/
  - type: Protobuf
    url: grpc/grafana-loki-push.proto
    name: Loki Pusher service (proto3)
  - type: Protobuf
    url: grpc/grafana-loki-logproto.proto
    name: Loki Querier and StreamData services (proto3)
  - type: Protobuf
    url: grpc/grafana-loki-rules.proto
    name: Loki ruler rule group messages (proto3)
- aid: grafana-loki:grafana-cloud-logs-api
  name: Grafana Cloud Logs API
  description: Grafana Cloud Logs is the fully managed Grafana Loki service. It serves the same Loki HTTP API on a per-stack
    host of the form logs-prod-<cluster>.grafana.net, authenticated with HTTP Basic where the username is the tenant and the
    password is an access policy token carrying logs:read, logs:write or logs:delete. A free tier allows 50 GB of ingest per
    month with 14 day retention.
  humanURL: https://grafana.com/docs/grafana-cloud/send-data/logs/
  baseURL: https://logs-prod-{cluster}.grafana.net
  tags:
  - Logs
  - Observability
  - Managed Service
  properties:
  - type: Documentation
    url: https://grafana.com/docs/grafana-cloud/send-data/logs/
  - type: APIReference
    url: https://grafana.com/docs/loki/latest/reference/loki-http-api/
  - type: Pricing
    url: https://grafana.com/pricing/
- aid: grafana-loki:grafana-mcp-loki-tools
  name: Grafana MCP Server — Loki tools
  description: Grafana Loki reaches MCP clients through the Grafana Labs MCP servers, which register a Loki tool family (query_loki_logs,
    list_loki_label_names, list_loki_label_values, query_loki_stats, query_loki_patterns, analyze_loki_labels, suggest_loki_alloy_label_config).
    The hosted Grafana Cloud MCP server answers at https://mcp.grafana.com/mcp over streamable HTTP with OAuth 2.1; the open
    source grafana/mcp-grafana server runs locally over stdio, SSE or streamable HTTP.
  humanURL: https://grafana.com/docs/grafana-cloud/ai-tools/mcp-servers/cloud-mcp/
  baseURL: https://mcp.grafana.com/mcp
  tags:
  - MCP
  - Agents
  - Logs
  properties:
  - type: MCPServer
    url: mcp/grafana-loki-mcp.yml
    name: Grafana MCP server (Loki tools)
  - type: ToolCrosswalk
    url: mcp/grafana-loki-tool-crosswalk.yml
  - type: Documentation
    url: https://grafana.com/docs/grafana/latest/developer-resources/mcp/
  - type: GitHubOrganization
    url: https://github.com/grafana/mcp-grafana
common:
- type: License
  name: AGPL-3.0
  url: https://github.com/grafana/loki/blob/main/LICENSE
- type: Website
  url: https://grafana.com/oss/loki/
- type: DeveloperPortal
  url: https://grafana.com/docs/loki/latest/
- type: Documentation
  url: https://grafana.com/docs/loki/latest/
- type: APIReference
  url: https://grafana.com/docs/loki/latest/reference/loki-http-api/
- type: GettingStarted
  url: https://grafana.com/docs/loki/latest/get-started/
- type: Support
  url: https://community.grafana.com/
- type: Blog
  url: https://grafana.com/blog/
- type: GitHubOrganization
  url: https://github.com/grafana
- type: SourceCode
  url: https://github.com/grafana/loki
- type: Pricing
  url: https://grafana.com/pricing/
- type: SignUp
  url: https://grafana.com/auth/sign-up/create-user
- type: TermsOfService
  url: https://grafana.com/legal/terms/
- type: PrivacyPolicy
  url: https://grafana.com/legal/privacy-policy/
- type: Security
  url: https://grafana.com/security/
  name: Grafana Labs security advisories and vulnerability disclosure
- type: Compliance
  url: https://grafana.com/legal/security-compliance/
  name: 'Grafana Labs security compliance: ISO 27001, SOC 2 Type 2, PCI DSS, GDPR, CSA STAR, FedRAMP High'
- type: TrustCenter
  url: security/grafana-loki-trust-center.yml
- type: StatusPage
  url: https://status.grafana.com/
  name: Grafana Cloud Status
- type: Deprecation
  url: lifecycle/grafana-loki-lifecycle.yml
  name: Loki deprecated endpoints and upgrade guide
- type: Lifecycle
  url: lifecycle/grafana-loki-lifecycle.yml
- type: ChangeLog
  url: changelog/grafana-loki-changelog.yml
- type: Protobuf
  url: grpc/grafana-loki-push.proto
- type: Authentication
  url: authentication/grafana-loki-authentication.yml
- type: OAuthScopes
  url: scopes/grafana-loki-scopes.yml
- type: Conventions
  url: conventions/grafana-loki-conventions.yml
- type: Idempotency
  url: conventions/grafana-loki-conventions.yml
  name: Retry, idempotency and reversibility semantics
- type: ErrorCatalog
  url: errors/grafana-loki-problem-types.yml
- type: RateLimits
  url: rate-limits/grafana-loki-rate-limits.yml
- type: Plans
  url: plans/grafana-loki-plans-pricing.yml
- type: Packages
  url: packages/grafana-loki-packages.yml
- type: SDKs
  url: packages/grafana-loki-packages.yml
  name: First-party libraries and distributions (Go push contract module, Helm charts, images)
- type: CLI
  url: cli/grafana-loki-cli.yml
  name: LogCLI
- type: Sandbox
  url: sandbox/grafana-loki-sandbox.yml
- type: DataModel
  url: data-model/grafana-loki-data-model.yml
- type: Conformance
  url: conformance/grafana-loki-conformance.yml
- type: DomainSecurity
  url: security/grafana-loki-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/grafana-loki-vulnerability-disclosure.yml
- type: WellKnown
  url: well-known/grafana-loki-well-known.yml
- type: LLMsTxt
  url: llms/grafana-loki-llms.txt
  name: grafana.com/llms.txt (Grafana Labs site-wide, saved verbatim)
- type: AgentSkill
  url: skills/_index.yml
  name: Grafana Loki agent skills
- type: AgentSkill
  url: skills/grafana-loki-query-logs.md
  name: Query logs from Grafana Loki
- type: AgentSkill
  url: skills/grafana-loki-push-logs.md
  name: Push logs into Grafana Loki
- type: AgentSkill
  url: skills/grafana-loki-delete-logs.md
  name: Delete logs from Grafana Loki and cancel within the window
- type: AgentSkill
  url: skills/grafana-loki-manage-alerting-rules.md
  name: Manage Loki alerting and recording rules
x-enrichment:
  date: '2026-08-27'
  status: enriched
  artifacts_added: 32
  pass: local-v1

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