fiddler.ai

Fiddler AI is an enterprise AI Observability and Security platform — an "AI Control Plane" for AI agents, LLM applications, and traditional ML models. It delivers unified monitoring, real-time guardrails (safety, hallucination/faithfulness, and PII/sensitive-data detection), evaluation and experiments, drift and performance tracking, LLM-as-a-Judge custom evaluators, alerting, and governance/compliance across the AI lifecycle. Fiddler exposes a REST API (v3), an official Python client (fiddler-client), OpenTelemetry-native ingestion, and a remote MCP server for agent-native access to observability data.

fiddler.ai publishes 1 API on the APIs.io network. Tagged areas include Company, AI Observability, Machine Learning, LLM, and Model Monitoring.

The fiddler.ai catalog on APIs.io includes 1 event-driven AsyncAPI specification.

fiddler.ai’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, changelog, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.6/100 thin ▬ flat Agent 35/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs 1 MCP Servers

CompanyAI ObservabilityMachine LearningLLMModel MonitoringGuardrailsMLOpsAI GovernanceExplainabilityAgent ObservabilityAI Security

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 42.6/100 · thin

Contract Quality 5.7 / 25

Developer Ergonomics 13.5 / 20

Commercial Clarity 9.5 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 35/100 · 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 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 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/fiddlerai: 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.

Fiddler REST API

REST API (v3) for the Fiddler AI Observability platform — projects, models, applications, events, traces/sessions/spans, evaluators, alert rules, guardrails, custom metrics, and...

MCP Servers 1

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

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Webhooks

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

Authentication

Compliance

TrustCenter

Operate 3

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Deprecation

Deprecation

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: fiddlerai
name: fiddler.ai
description: Fiddler AI is an enterprise AI Observability and Security platform — an "AI Control Plane" for AI agents, LLM
  applications, and traditional ML models. It delivers unified monitoring, real-time guardrails (safety, hallucination/faithfulness,
  and PII/sensitive-data detection), evaluation and experiments, drift and performance tracking, LLM-as-a-Judge custom evaluators,
  alerting, and governance/compliance across the AI lifecycle. Fiddler exposes a REST API (v3), an official Python client
  (fiddler-client), OpenTelemetry-native ingestion, and a remote MCP server for agent-native access to observability data.
url: https://raw.githubusercontent.com/api-evangelist/fiddlerai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-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: '2026-07-19'
image: https://www.fiddler.ai/favicon.ico
tags:
- Company
- AI Observability
- Machine Learning
- LLM
- Model Monitoring
- Guardrails
- MLOps
- AI Governance
- Explainability
- Agent Observability
- AI Security
apis:
- name: Fiddler REST API
  description: REST API (v3) for the Fiddler AI Observability platform — projects, models, applications, events, traces/sessions/spans,
    evaluators, alert rules, guardrails, custom metrics, and jobs. Resource-oriented URLs, JSON envelopes, Bearer auth.
  humanURL: https://docs.fiddler.ai/api/rest-api/rest-api
  baseURL: https://demo.fiddler.ai/v3
  tags:
  - AI Observability
  - Guardrails
  - Monitoring
  properties:
  - type: Documentation
    url: https://docs.fiddler.ai/api
  - type: APIReference
    url: https://docs.fiddler.ai/api/rest-api/rest-api
  - type: Authentication
    url: authentication/fiddlerai-authentication.yml
  - type: Conventions
    url: conventions/fiddlerai-conventions.yml
  - type: ErrorCatalog
    url: errors/fiddlerai-problem-types.yml
  - type: DataModel
    url: data-model/fiddlerai-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/fiddlerai-domain-security.yml
- type: Website
  url: https://www.fiddler.ai/
- type: DeveloperPortal
  url: https://docs.fiddler.ai/developers
- type: Documentation
  url: https://docs.fiddler.ai
- type: APIReference
  url: https://docs.fiddler.ai/api/rest-api/rest-api
- type: GettingStarted
  url: https://docs.fiddler.ai/product-guide/getting-started
- type: Support
  url: https://www.fiddler.ai/contact-sales
- type: Blog
  url: https://www.fiddler.ai/blog
- type: GitHubOrganization
  url: https://github.com/fiddler-labs
- type: Pricing
  url: https://www.fiddler.ai/pricing
- type: TermsOfService
  url: https://www.fiddler.ai/terms-of-use
- type: PrivacyPolicy
  url: https://www.fiddler.ai/privacy-policy
- type: ChangeLog
  url: https://docs.fiddler.ai/changelog/
- type: MCPServer
  url: mcp/fiddlerai-mcp.yml
- type: Packages
  url: packages/fiddlerai-packages.yml
- type: SDKs
  url: packages/fiddlerai-packages.yml
- type: Authentication
  url: authentication/fiddlerai-authentication.yml
- type: Conventions
  url: conventions/fiddlerai-conventions.yml
- type: ErrorCatalog
  url: errors/fiddlerai-problem-types.yml
- type: Lifecycle
  url: lifecycle/fiddlerai-lifecycle.yml
- type: Deprecation
  url: https://docs.fiddler.ai/changelog/python-sdk
- type: Conformance
  url: conformance/fiddlerai-conformance.yml
- type: Compliance
  url: https://www.fiddler.ai/security
- type: TrustCenter
  url: https://trust-center.fiddler.ai
- type: Webhooks
  url: asyncapi/fiddlerai-alerts-webhooks.yml
- type: DataModel
  url: data-model/fiddlerai-data-model.yml
- type: LLMsTxt
  url: llms/fiddlerai-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

fiddler.ai

Kin Score

APIs 1

Fiddler REST API

MCP Servers 1

fiddlerai-mcp.yml

Event Specifications 1

Fiddlerai Alerts Webhooks

Security Posture 3

Fiddlerai Authentication

Fiddlerai Domain Security

Fiddlerai Trust Center

Resources