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

41.4/100 developing ▬ flat Agent 38/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs 1 MCP Servers

Company Enterprise Observability Continuous Profiling Performance eBPF gRPC Developer Tools MCP GPU

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 41.4/100 · developing

Contract Quality 6.7 / 25

Developer Ergonomics 13.2 / 20

Access Clarity 10.0 / 20

Operational Transparency 1.7 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 38/100 · 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

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/polar-signals: 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 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.

Polar Signals MCP Server

Official Model Context Protocol server that lets AI assistants (Claude, Cursor, Copilot, Gemini) query Polar Signals continuous-profiling data using natural language, discover p...

MCP SERVER

Security Posture 4

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

Polar Signals Authentication

http/oauth2/openIdConnect · 3 schemes

SECURITY

Polar Signals Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Polar Signals Vulnerability Disclosure

Hackerone · contact published

SECURITY

Polar Signals Trust Center

SOC 2 Type II

SECURITY

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
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

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