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
39.4/100 thin ▬ flat Agent 30/100 agent aware Full breakdown ↓
scored 2026-07-23 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
CompanyEnterpriseObservabilityContinuous ProfilingPerformanceeBPFgRPCDeveloper ToolsMCPGPU

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-23 · rubric v0.5
Composite quality — 39.4/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 16.1 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 30/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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 4 / 4
Consent & Bot Identity 0 / 3
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.

polar-signals-mcp.yml

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
MCPServer
 WellKnown
WellKnown
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel
 Conformance
Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 7

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes
 Compliance
Compliance
 TrustCenter
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)

apis.yml Raw ↑ 
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: '0.20'
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