Polar Signals

Polar Signals is a continuous profiling company built by the team behind the open-source Parca project. Its Polar Signals Cloud product uses eBPF to continuously profile CPU, memory, and NVIDIA GPU workloads across Kubernetes, Docker, ECS, and bare metal with under 1% overhead and no code changes, storing profiles in the open-source FrostDB columnar database and querying them with Prometheus-style label selectors and PromQL. It exposes a gRPC/Connect API (published at buf.build/polarsignals/api) for managing organizations, projects, service accounts, roles, RBAC, and billing; a Parca-compatible profiling data plane at grpc.polarsignals.com; a hosted MCP server for AI-assisted performance analysis; language agents and SDKs for Go, Rust, Python, Node.js, JVM, .NET, PHP, Ruby and more; and the psctl CLI.

Polar Signals publishes 1 API on the APIs.io network. Tagged areas include Company, Enterprise, Observability, Continuous Profiling, and Performance.

Polar Signals’ developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.9/100 developing ▬ flat Agent 35/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

1 APIs 1 MCP Servers

CompanyEnterpriseObservabilityContinuous ProfilingPerformanceeBPFgRPCDeveloper ToolsMCPGPU

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 42.9/100 · developing

Contract Quality 7.1 / 25

Developer Ergonomics 13.2 / 20

Access Clarity 10.0 / 20

Operational Transparency 1.7 / 13

Contract Governance 2.2 / 12

Discoverability 8.7 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

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/polar-signals: 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.

Polar Signals Cloud API

gRPC/Connect API for managing Polar Signals Cloud organizations, projects, service accounts, tokens, roles/RBAC, rate limits, and billing, plus a Parca-compatible profiling data...

MCP Servers 1

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

Scopes 1

OAuth scopes governing access to this provider's APIs.

Polar Signals Scopes

5 scopes · authorizationCode

5 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

AgentSkill

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 7

Authentication, authorization, and security posture

DomainSecurity

Authentication

OAuthScopes

Compliance

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Scroll for all 7

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

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: polar-signals
name: Polar Signals
description: Polar Signals is a continuous profiling company built by the team behind the open-source Parca project. Its Polar
  Signals Cloud product uses eBPF to continuously profile CPU, memory, and NVIDIA GPU workloads across Kubernetes, Docker,
  ECS, and bare metal with under 1% overhead and no code changes, storing profiles in the open-source FrostDB columnar database
  and querying them with Prometheus-style label selectors and PromQL. It exposes a gRPC/Connect API (published at buf.build/polarsignals/api)
  for managing organizations, projects, service accounts, roles, RBAC, and billing; a Parca-compatible profiling data plane
  at grpc.polarsignals.com; a hosted MCP server for AI-assisted performance analysis; language agents and SDKs for Go, Rust,
  Python, Node.js, JVM, .NET, PHP, Ruby and more; and the psctl CLI.
url: https://raw.githubusercontent.com/api-evangelist/polar-signals/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- gv
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://avatars.githubusercontent.com/u/71665167?v=4
tags:
- Company
- Enterprise
- Observability
- Continuous Profiling
- Performance
- eBPF
- gRPC
- Developer Tools
- MCP
- GPU
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Polar Signals Cloud API
  description: gRPC/Connect API for managing Polar Signals Cloud organizations, projects, service accounts, tokens, roles/RBAC,
    rate limits, and billing, plus a Parca-compatible profiling data plane for uploading and querying profiles.
  humanURL: https://buf.build/polarsignals/api
  baseURL: https://api.polarsignals.com
  properties:
  - type: Protobuf
    url: grpc/polar-signals-project.proto
  - type: Protobuf
    url: grpc/polar-signals-organization.proto
  - type: Protobuf
    url: grpc/polar-signals-serviceaccount.proto
common:
- type: DomainSecurity
  url: security/polar-signals-domain-security.yml
- type: Website
  url: https://www.polarsignals.com
- type: DeveloperPortal
  url: https://www.polarsignals.com/docs
- type: Documentation
  url: https://www.polarsignals.com/docs/overview
- type: APIReference
  url: https://buf.build/polarsignals/api
- type: GettingStarted
  url: https://www.polarsignals.com/docs/quick-start-guide
- type: Support
  url: https://www.polarsignals.com/docs/contact-support
- type: Blog
  url: https://www.polarsignals.com/blog
- type: GitHubOrganization
  url: https://github.com/polarsignals
- type: Pricing
  url: https://www.polarsignals.com/pricing
- type: SignUp
  url: https://cloud.polarsignals.com/signup
- type: PrivacyPolicy
  url: https://www.polarsignals.com/privacy
- type: StatusPage
  url: https://polarsignals.instatus.com/
- type: Protobuf
  url: grpc/polar-signals-project.proto
- type: MCPServer
  url: mcp/polar-signals-mcp.yml
- type: Packages
  url: packages/polar-signals-packages.yml
- type: SDKs
  url: packages/polar-signals-packages.yml
- type: CLI
  url: cli/polar-signals-cli.yml
- type: Authentication
  url: authentication/polar-signals-authentication.yml
- type: OAuthScopes
  url: scopes/polar-signals-scopes.yml
- type: WellKnown
  url: well-known/polar-signals-well-known.yml
- type: Lifecycle
  url: lifecycle/polar-signals-lifecycle.yml
- type: Conventions
  url: conventions/polar-signals-conventions.yml
- type: DataModel
  url: data-model/polar-signals-data-model.yml
- type: Conformance
  url: conformance/polar-signals-conformance.yml
- type: Compliance
  url: https://www.polarsignals.com/docs/security-posture
- type: TrustCenter
  url: security/polar-signals-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/polar-signals-vulnerability-disclosure.yml
- type: Security
  url: security/polar-signals-vulnerability-disclosure.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/polar-signals-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 26
  pass: local-v1