Arize Phoenix
Arize Phoenix is an open-source AI observability and evaluation platform built on OpenTelemetry, enabling developers to trace, evaluate, and debug LLM applications in production or locally. Phoenix exposes a REST API for programmatically ingesting spans and traces, managing datasets, running experiments, submitting annotations, and querying evaluation results. The platform supports a wide range of LLM frameworks including LangChain, LlamaIndex, OpenAI, Anthropic, and CrewAI through auto-instrumentation. Phoenix can be self-hosted in a single command or used as a managed cloud service (Arize AX), with authentication via API keys and OAuth2/OIDC for enterprise deployments.
Arize Phoenix publishes 17 APIs on the APIs.io network, including annotation_configs API, annotations API, Arize Phoenix Version API, and 14 more. Tagged areas include LLM Observability, AI Evaluation, OpenTelemetry, Tracing, and LLMOps.
The Arize Phoenix catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.
Arize Phoenix’s developer surface includes documentation, engineering blog, pricing, and 9 more developer resources.
Kin Score
APIs 17
Individual APIs this provider publishes, each with its own machine-readable definition.
Arize Phoenix annotation_configs API
The annotation_configs API from Arize Phoenix — 3 operation(s) for annotation_configs.
Arize Phoenix annotations API
The annotations API from Arize Phoenix — 3 operation(s) for annotations.
Arize Phoenix Arize Phoenix Version API
The Arize Phoenix Version API from Arize Phoenix — 1 operation(s) for arize phoenix version.
Arize Phoenix Auth API
The Auth API from Arize Phoenix — 6 operation(s) for auth.
Arize Phoenix chat API
The chat API from Arize Phoenix — 2 operation(s) for chat.
Arize Phoenix datasets API
The datasets API from Arize Phoenix — 9 operation(s) for datasets.
Arize Phoenix experiments API
The experiments API from Arize Phoenix — 8 operation(s) for experiments.
Arize Phoenix Healthz API
The Healthz API from Arize Phoenix — 1 operation(s) for healthz.
Arize Phoenix Oauth2 API
The Oauth2 API from Arize Phoenix — 2 operation(s) for oauth2.
Arize Phoenix projects API
The projects API from Arize Phoenix — 2 operation(s) for projects.
Arize Phoenix prompts API
The prompts API from Arize Phoenix — 8 operation(s) for prompts.
Arize Phoenix Readyz API
The Readyz API from Arize Phoenix — 1 operation(s) for readyz.
Arize Phoenix secrets API
The secrets API from Arize Phoenix — 1 operation(s) for secrets.
Arize Phoenix sessions API
The sessions API from Arize Phoenix — 5 operation(s) for sessions.
Arize Phoenix spans API
The spans API from Arize Phoenix — 6 operation(s) for spans.
Arize Phoenix traces API
The traces API from Arize Phoenix — 4 operation(s) for traces.
Arize Phoenix users API
The users API from Arize Phoenix — 3 operation(s) for users.
Scroll for all 17
Open Collections 18
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONArize-Phoenix REST annotation_configs API
OPEN COLLECTIONArize-Phoenix REST annotation_configs annotations API
OPEN COLLECTIONArize-Phoenix REST annotation_configs Auth API
OPEN COLLECTIONArize-Phoenix REST annotation_configs chat API
OPEN COLLECTIONArize-Phoenix REST annotation_configs datasets API
OPEN COLLECTIONArize-Phoenix REST annotation_configs experiments API
OPEN COLLECTIONArize-Phoenix REST annotation_configs Healthz API
OPEN COLLECTIONArize-Phoenix REST annotation_configs Oauth2 API
OPEN COLLECTIONArize-Phoenix REST annotation_configs projects API
OPEN COLLECTIONArize-Phoenix REST annotation_configs prompts API
OPEN COLLECTIONArize-Phoenix REST annotation_configs Readyz API
OPEN COLLECTIONArize-Phoenix REST annotation_configs secrets API
OPEN COLLECTIONArize-Phoenix REST annotation_configs sessions API
OPEN COLLECTIONArize-Phoenix REST annotation_configs spans API
OPEN COLLECTIONArize-Phoenix REST annotation_configs traces API
OPEN COLLECTIONArize-Phoenix REST annotation_configs users API
OPEN COLLECTIONScroll for all 18
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Phoenix Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Phoenix Finops
FINOPSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Phoenix Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Arize Phoenix API Rules
SPECTRALJSON Schema 10
Standalone JSON Schema definitions for this provider's data models.
AnnotateSpansRequestBody
JSON SCHEMAAnnotateSpansResponseBody
JSON SCHEMAAnnotationResult
JSON SCHEMADataset
JSON SCHEMADatasetVersion
JSON SCHEMAExperiment
JSON SCHEMAExperimentRun
JSON SCHEMAProject
JSON SCHEMASpan
JSON SCHEMASpanAnnotation
JSON SCHEMAScroll for all 10
Examples 4
Example request and response payloads for these APIs.
Phoenix Create Span Example
EXAMPLESecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
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.
Call it yourself
curl for this page
curl "https://apis.io/api/v1/providers/phoenix"
curl "https://apis.io/api/v1/providers?limit=25"
curl "https://apis.io/api/v1/providers/phoenix/operations?limit=25"
curl "https://apis.io/api/v1/providers/phoenix/evidence"
Discovery needs no key. Ratings and market analysis are Pro.