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 is listed with 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 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

52.4/100 developing ▬ flat Agent 41/100 agent ready Front door AI 5/6 prominent Heartbeat 54/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

1 API 1 MCP Servers 2 Agent Skills

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

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 52.4/100 · developing

Contract Quality 5.1 / 21

Developer Ergonomics 11.2 / 17

Access Clarity 15.2 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 6.2 / 15

Agent readiness — 41/100 · 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 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/polar-signals/"><img src="https://apis.io/badge/polar-signals/card.svg" alt="Polar Signals on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 24.0 — up to +19.0 composite points
Operational Transparency scores 13.2 — up to +11.3 composite points
Contract Governance scores 18.2 — up to +9.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/polar-signals/apis.yml: open an issue on github.com/api-evangelist/polar-signals to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	standard	40.2	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

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

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Analyze production performance with Polar Signals

AGENT SKILL

Provision a Polar Signals project and ingest token

AGENT SKILL

Polar Signals API pricing

Prices published by Polar Signals, read 2026-10-28 from www.polarsignals.com/pricing. A free plan or tier is listed.

Plan	Price
Free trial	Free for 14 days Includes: Full Pro tier feature set, Getting started guides, Community support, 14-day retention
Pro	$50 per 100 mil samples/ mo Includes: CPU/Memory/GPU profiling for any language, unlimited collaborators/projects/organizations/teams, SSO
Enterprise	Custom Includes: All features in Pro plan, plus custom contracts, volume discounts, premium support, custom SLAs, BYO

Plan details, limits and sources →

Billed by: 100 mil samples · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Polar Signals Plans Pricing

3 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Polar Signals

SLA

FinOps 1

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

Polar Signals Finops

FINOPS

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 3

Pricing, plans, and the legal terms of use

Plans

Plans

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: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  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: Plans
  url: plans/polar-signals-plans-pricing.yml
- 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

Polar Signals API — frequently asked questions

Does Polar Signals have an API?

Yes. APIs.io lists 1 API from Polar Signals, including Polar Signals Cloud API.

How do I authenticate with the Polar Signals API?

Polar Signals documents its authentication (http/oauth2/openIdConnect · 3 schemes). The details are profiled on APIs.io as Polar Signals Authentication.

How much does the Polar Signals API cost?

Polar Signals publishes its prices; its Free trial plan is Free for 14 days as of 2026-10-28. APIs.io lists 3 pricing plans for Polar Signals, with each plan's price, limits and inclusions under Pricing on this page.

Does Polar Signals have an MCP server?

Yes. APIs.io lists 1 MCP server for Polar Signals: Official Model Context Protocol server that lets AI assistants (Claude, Cursor, Copilot, Gemini) query Polar Signals continuous-profiling data using natural language, discover projects and profile typ

Is the Polar Signals API ready for AI agents?

Polar Signals has a Kin Score of 52.4 out of 100 (developing) and an Agent Readiness score of 41.2 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/polar-signals"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/polar-signals/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/polar-signals/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.