Sentrial

Sentrial is an observability platform for AI agents, backed by Y Combinator. It tracks every agent session, tool call, and LLM interaction, then automatically detects issues, diagnoses root causes, and helps teams fix them in code. Developers instrument agents with the Sentrial Python or TypeScript SDK (one-line integrations for LangChain, CrewAI, AutoGen, Mastra, the Vercel AI SDK, and the Claude Agent SDK), by sending OpenTelemetry traces, or by calling the REST ingestion API (https://api.sentrial.com) directly to create sessions and record events. A `sentrial` CLI ships with the SDK for local setup, scriptable session/event inspection, diagnosis, and CI regression gates.

Sentrial publishes 2 API contracts indexed on the APIs.io network: Events API and Sessions API. Tagged areas include Company, AI Agents, Observability, Monitoring, and LLM.

The Sentrial catalog on APIs.io includes 1 Spectral governance ruleset.

Sentrial’s developer surface includes authentication, documentation, API reference, getting-started guide, engineering blog, signup flow, CLI, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.5/100 thin ▲ 7.9 Agent 26/100 agent aware Front door AI 3/6 light saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 2 Agent Skills

Company AI Agents Observability Monitoring LLM Developer Tools Tracing

Kin Score

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

Composite quality — 32.5/100 · thin

Contract Quality 2.7 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 5.1 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 3.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 14.3 — up to +21.4 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Operational Transparency scores 2.6 — up to +12.7 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/sentrial/apis.yml: open an issue on github.com/api-evangelist/sentrial 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 →

Standards implemented 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

Sentrial Events API

Track events within agent sessions.

Sentrial Sessions API

Create and manage agent sessions.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Sentrial SDK Events API

OPEN COLLECTION

Sentrial SDK Events Sessions API

OPEN COLLECTION

Agent Skills 2

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

Record a tool call or decision event

AGENT SKILL

Track an agent session end-to-end

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sentrial API Rules

57 rules · 55 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Sentrial Openapi Overlay

2 actions · update · sentrial-openapi.yml

DERIVED

Security Posture 2

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

Sentrial Authentication

http · 1 scheme

SECURITY

Sentrial Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

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

X-MCPServerCandidate

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Conformance

Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

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

Overlay

Overlay

Source (apis.yml)

aid: sentrial
name: Sentrial
description: Sentrial is an observability platform for AI agents, backed by Y Combinator. It tracks every agent session, tool
  call, and LLM interaction, then automatically detects issues, diagnoses root causes, and helps teams fix them in code. Developers
  instrument agents with the Sentrial Python or TypeScript SDK (one-line integrations for LangChain, CrewAI, AutoGen, Mastra,
  the Vercel AI SDK, and the Claude Agent SDK), by sending OpenTelemetry traces, or by calling the REST ingestion API (https://api.sentrial.com)
  directly to create sessions and record events. A `sentrial` CLI ships with the SDK for local setup, scriptable session/event
  inspection, diagnosis, and CI regression gates.
url: https://raw.githubusercontent.com/api-evangelist/sentrial/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.sentrial.com/og-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- AI Agents
- Observability
- Monitoring
- LLM
- Developer Tools
- Tracing
apis:
- aid: sentrial:sentrial-events-api
  name: Sentrial Events API
  description: Track events within agent sessions.
  humanURL: https://www.sentrial.com/docs
  baseURL: https://api.sentrial.com
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/sentrial-events-api-openapi.yml
  - type: Documentation
    url: https://www.sentrial.com/docs
  - type: APIReference
    url: https://www.sentrial.com/docs/api/sessions
  - type: GettingStarted
    url: https://www.sentrial.com/docs/quickstart
  - type: Authentication
    url: authentication/sentrial-authentication.yml
- aid: sentrial:sentrial-sessions-api
  name: Sentrial Sessions API
  description: Create and manage agent sessions.
  humanURL: https://www.sentrial.com/docs
  baseURL: https://api.sentrial.com
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/sentrial-sessions-api-openapi.yml
  - type: Documentation
    url: https://www.sentrial.com/docs
  - type: APIReference
    url: https://www.sentrial.com/docs/api/sessions
  - type: GettingStarted
    url: https://www.sentrial.com/docs/quickstart
  - type: Authentication
    url: authentication/sentrial-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.sentrial.com/
- type: DomainSecurity
  url: security/sentrial-domain-security.yml
- type: Authentication
  url: authentication/sentrial-authentication.yml
- type: Documentation
  url: https://www.sentrial.com/docs
- type: APIReference
  url: https://www.sentrial.com/docs/api/sessions
- type: GettingStarted
  url: https://www.sentrial.com/docs/quickstart
- type: Blog
  url: https://www.sentrial.com/blog
- type: SignUp
  url: https://sentrial.com/signup
- type: TermsOfService
  url: https://www.sentrial.com/terms
- type: PrivacyPolicy
  url: https://www.sentrial.com/privacy
- type: GitHubOrganization
  url: https://github.com/sentrialdev
- type: Packages
  url: packages/sentrial-packages.yml
- type: SDKs
  url: packages/sentrial-packages.yml
- type: CLI
  url: cli/sentrial-cli.yml
- type: Conventions
  url: conventions/sentrial-conventions.yml
- type: ErrorCatalog
  url: errors/sentrial-error-codes.yml
- type: DataModel
  url: data-model/sentrial-data-model.yml
- type: Conformance
  url: conformance/sentrial-conformance.yml
- type: Lifecycle
  url: lifecycle/sentrial-lifecycle.yml
- type: Overlay
  url: overlays/sentrial-openapi-overlay.yaml
- type: X-MCPServerCandidate
  url: mcp/sentrial-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/sentrial-llms.txt
- type: AgentSkill
  url: skills/sentrial-track-agent-session.md
- type: AgentSkill
  url: skills/sentrial-record-tool-call.md
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 17
  pass: local-v1

Sentrial API — frequently asked questions

Does Sentrial have an API?

Yes. APIs.io lists 2 APIs from Sentrial, including Sentrial Events API and Sentrial Sessions API.

Is there an OpenAPI specification for the Sentrial API?

Yes. APIs.io indexes 2 OpenAPI specifications for Sentrial, each linked for download from this page.

How do I authenticate with the Sentrial API?

Sentrial uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Sentrial Authentication.

Is the Sentrial API ready for AI agents?

Sentrial has a Kin Score of 32.5 out of 100 (thin) and an Agent Readiness score of 25.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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