Meddra

MedDRA (Medical Dictionary for Regulatory Activities) is a clinically validated international medical terminology dictionary used by regulatory authorities and the regulated biopharmaceutical industry.

Meddra publishes 4 APIs on the APIs.io network, including Hierarchy API, Terms API, Validation API, and 1 more.

The Meddra catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Meddra’s developer surface includes authentication, developer portal, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.6/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve

1 APIs

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 29.6/100 · thin

Contract Quality 13.8 / 23

Developer Ergonomics 3.9 / 18

Access Clarity 2.8 / 18

Operational Transparency 0.9 / 12

Contract Governance 1.1 / 11

Discoverability 4.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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

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.

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 github.com/api-evangelist/meddra: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

meddra Hierarchy API

MedDRA hierarchy navigation (SOC → HLGT → HLT → PT → LLT)

meddra Terms API

MedDRA term search and retrieval

meddra Validation API

Code validation for regulatory submissions

meddra Versions API

Dictionary version management

Open Collections 6

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

API Collection

OPEN COLLECTION

MedDRA Medical Dictionary for Regulatory Activities Hierarchy API

OPEN COLLECTION

MedDRA Medical Dictionary for Regulatory Activities API

OPEN COLLECTION

MedDRA Medical Dictionary for Regulatory Activities Hierarchy Terms API

OPEN COLLECTION

MedDRA Medical Dictionary for Regulatory Activities Hierarchy Validation API

OPEN COLLECTION

MedDRA Medical Dictionary for Regulatory Activities Hierarchy Versions API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Meddra Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Meddra Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Meddra Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Meddra Context

2 classes · 13 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Meddra API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

MedDRA Term

9 properties

JSON SCHEMA

Security Posture 2

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

Meddra Authentication

apiKey/http · 2 schemes

SECURITY

Meddra Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Meddra Agentic Access

7 operations · 1 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 2

Reference material describing how the API behaves

OpenAPI

OpenAPI

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLDContext

JSONLDContext

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

name: Meddra
aid: meddra
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
specificationVersion: '0.23'
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  try_now_blocked_by: example-domain
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/meddra.png
url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/apis.yml
apis:
- aid: meddra:meddra-hierarchy-api
  name: meddra Hierarchy API
  description: MedDRA hierarchy navigation (SOC → HLGT → HLT → PT → LLT)
  humanURL: https://www.meddra.org/
  baseURL: https://api.meddra.example.com
  tags:
  - Hierarchy
  properties:
  - type: OpenAPI
    url: openapi/meddra-hierarchy-api-openapi.yml
  - type: Documentation
    url: https://www.meddra.org/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-schema/meddra-term-schema.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-ld/meddra-context.jsonld
- aid: meddra:meddra-terms-api
  name: meddra Terms API
  description: MedDRA term search and retrieval
  humanURL: https://www.meddra.org/
  baseURL: https://api.meddra.example.com
  tags:
  - Terms
  properties:
  - type: OpenAPI
    url: openapi/meddra-terms-api-openapi.yml
  - type: Documentation
    url: https://www.meddra.org/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-schema/meddra-term-schema.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-ld/meddra-context.jsonld
- aid: meddra:meddra-validation-api
  name: meddra Validation API
  description: Code validation for regulatory submissions
  humanURL: https://www.meddra.org/
  baseURL: https://api.meddra.example.com
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/meddra-validation-api-openapi.yml
  - type: Documentation
    url: https://www.meddra.org/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-schema/meddra-term-schema.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-ld/meddra-context.jsonld
- aid: meddra:meddra-versions-api
  name: meddra Versions API
  description: Dictionary version management
  humanURL: https://www.meddra.org/
  baseURL: https://api.meddra.example.com
  tags:
  - Versions
  properties:
  - type: OpenAPI
    url: openapi/meddra-versions-api-openapi.yml
  - type: Documentation
    url: https://www.meddra.org/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-schema/meddra-term-schema.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-ld/meddra-context.jsonld
common:
- type: AgenticAccess
  url: agentic-access/meddra-agentic-access.yml
- type: DomainSecurity
  url: security/meddra-domain-security.yml
- type: Authentication
  url: authentication/meddra-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/meddra-msso
- url: https://www.meddra.org/
  type: Portal
- url: https://www.meddra.org/
  type: Website
- url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/openapi/meddra-terminology-openapi.yml
  type: OpenAPI
- url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-schema/meddra-term-schema.json
  type: JSONSchema
- url: https://raw.githubusercontent.com/api-evangelist/meddra/refs/heads/main/json-ld/meddra-context.jsonld
  type: JSONLDContext
maintainer:
  name: Kin Lane
  email: kin@apievangelist.com
modified: '2026-05-19'
description: MedDRA (Medical Dictionary for Regulatory Activities) is a clinically validated international medical terminology
  dictionary used by regulatory authorities and the regulated biopharmaceutical industry.

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