RSC

The Royal Society of Chemistry (RSC) provides developer APIs through its ChemSpider platform, enabling programmatic access to one of the world's largest chemistry databases with over 88 million unique chemical compounds. The APIs support compound search, structure retrieval, format conversion, and data enrichment for cheminformatics applications.

RSC publishes 4 APIs on the APIs.io network, including Filter API, Lookups API, Records API, and 1 more. Tagged areas include Chemistry, Cheminformatics, Chemical Data, and Science.

The RSC catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

RSC’s developer surface includes authentication, developer portal, signup flow, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
51.4/100 developing ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
4 APIs
ChemistryCheminformaticsChemical DataScience

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 51.4/100 · developing
Contract Quality 17.8 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 4.1 / 13
Governance 7.0 / 12
Discoverability 6.5 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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
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/rsc: 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 4

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

RSC Filter API

Search and filter chemical compounds by various properties.

RSC Lookups API

Look up reference data such as available data sources.

RSC Records API

Retrieve compound record details, images, and molecular files.

RSC Tools API

Chemical format conversion and validation utilities.

Open Collections 1

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

RSC ChemSpider Compounds API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Rsc Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Rsc Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Rsc Finops

FINOPS

Semantic Vocabularies 1

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

Rsc Context

5 classes · 15 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

RSC API Rules

5 rules · 3 warnings 2 info

SPECTRAL

RSC API Rules

18 rules · 2 errors 14 warnings 2 info

SPECTRAL

JSON Schema 1

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

ChemSpider Compound

14 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Rsc Compound Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Rsc Convert Chemical Format Example

2 fields

EXAMPLE

Rsc Filter By Name Example

2 fields

EXAMPLE

Rsc Get Record Details Example

2 fields

EXAMPLE

Security Posture 2

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

Rsc Authentication

apiKey · 1 scheme

SECURITY

Rsc Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Rsc Agentic Access

16 operations · 9 acting

16 operations · 9 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal
Portal
 Signup
Signup

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 Authentication
Authentication

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: rsc
name: RSC
description: The Royal Society of Chemistry (RSC) provides developer APIs through its ChemSpider platform, enabling programmatic
  access to one of the world's largest chemistry databases with over 88 million unique chemical compounds. The APIs support
  compound search, structure retrieval, format conversion, and data enrichment for cheminformatics applications.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/rsc.png
tags:
- Chemistry
- Cheminformatics
- Chemical Data
- Science
created: '2025-03-01'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/rsc/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: rsc:rsc-filter-api
  name: RSC Filter API
  description: Search and filter chemical compounds by various properties.
  humanURL: https://developer.rsc.org/
  baseURL: https://api.rsc.org/compounds/v1
  tags:
  - Filter
  properties:
  - type: OpenAPI
    url: openapi/rsc-filter-api-openapi.yml
  - type: Documentation
    url: https://developer.rsc.org/compounds-v1/apis
- aid: rsc:rsc-lookups-api
  name: RSC Lookups API
  description: Look up reference data such as available data sources.
  humanURL: https://developer.rsc.org/
  baseURL: https://api.rsc.org/compounds/v1
  tags:
  - Lookups
  properties:
  - type: OpenAPI
    url: openapi/rsc-lookups-api-openapi.yml
  - type: Documentation
    url: https://developer.rsc.org/compounds-v1/apis
- aid: rsc:rsc-records-api
  name: RSC Records API
  description: Retrieve compound record details, images, and molecular files.
  humanURL: https://developer.rsc.org/
  baseURL: https://api.rsc.org/compounds/v1
  tags:
  - Records
  properties:
  - type: OpenAPI
    url: openapi/rsc-records-api-openapi.yml
  - type: Documentation
    url: https://developer.rsc.org/compounds-v1/apis
- aid: rsc:rsc-tools-api
  name: RSC Tools API
  description: Chemical format conversion and validation utilities.
  humanURL: https://developer.rsc.org/
  baseURL: https://api.rsc.org/compounds/v1
  tags:
  - Tools
  properties:
  - type: OpenAPI
    url: openapi/rsc-tools-api-openapi.yml
  - type: Documentation
    url: https://developer.rsc.org/compounds-v1/apis
common:
- type: AgenticAccess
  url: agentic-access/rsc-agentic-access.yml
- type: DomainSecurity
  url: security/rsc-domain-security.yml
- type: Authentication
  url: authentication/rsc-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/rsc-equipment-rental
- type: Portal
  url: https://developer.rsc.org/
- type: Authentication
  url: https://developer.rsc.org/
- type: Signup
  url: https://developer.rsc.org/
- type: TermsOfService
  url: https://www.rsc.org/legal/
- type: PrivacyPolicy
  url: https://www.rsc.org/help-legal/legal/privacy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com