Quandl (Nasdaq Data Link) website screenshot

Quandl (Nasdaq Data Link)

Nasdaq Data Link (formerly Quandl) provides REST and streaming APIs for financial and economic data including time-series datasets, tabular datasets, and real-time market data feeds. Datasets cover stock prices, economic indicators, interest rates, commodities, equity fundamentals, options data, and alternative data sets.

Quandl (Nasdaq Data Link) publishes 3 APIs on the APIs.io network: Databases API, Datasets API, and Tables API. Tagged areas include Finance, Market Data, Economic Data, Time Series, and Streaming.

The Quandl (Nasdaq Data Link) catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Quandl (Nasdaq Data Link)’s developer surface includes authentication, developer portal, documentation, getting-started guide, support, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.6/100 thin ▬ flat Agent 38/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
AccessPaidSelf serve
5 APIs
FinanceMarket DataEconomic DataTime SeriesStreaming

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 38.6/100 · thin
Contract Quality 13.4 / 21
Developer Ergonomics 9.1 / 17
Access Clarity 2.2 / 17
Operational Transparency 1.2 / 11
Contract Governance 1.0 / 10
Discoverability 5.5 / 9
Regulatory Posture 5.7 / 15
Agent readiness — 38/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 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 4 / 4
Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data 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.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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/quandl: 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 5

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

Nasdaq Data Link Tables REST API

Nasdaq Data Link Tables API provides access to tabular financial datasets including equity fundamentals, options data, and alternative data sets. Limited to 10,000 rows per call...

Nasdaq Cloud Data Service (NCDS) Streaming API

Nasdaq Cloud Data Service (NCDS) provides streaming and REST APIs for real-time and delayed market data delivery including equities, options, and fixed income from Nasdaq exchan...

Quandl (Nasdaq Data Link) Databases API

Database catalog and metadata

Quandl (Nasdaq Data Link) Datasets API

Time-series dataset retrieval

Quandl (Nasdaq Data Link) Tables API

Tabular dataset retrieval

Open Collections 5

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

API Collection

OPEN COLLECTION

Nasdaq Data Link Time-Series REST API

OPEN COLLECTION

Nasdaq Data Link Time-Series REST Databases API

OPEN COLLECTION

Nasdaq Data Link Time-Series REST Databases Datasets API

OPEN COLLECTION

Nasdaq Data Link Time-Series REST Databases Tables API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Quandl Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Quandl Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Quandl Finops

FINOPS

Semantic Vocabularies 1

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

Nasdaq Data Link Context

0 classes · 19 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Quandl (Nasdaq Data Link) API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 1

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

Nasdaq Data Link Dataset

15 properties

JSON SCHEMA

Security Posture 2

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

Quandl Authentication

apiKey · 2 schemes

SECURITY

Quandl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Quandl Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal
Portal
 GettingStarted
GettingStarted

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 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

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 GitHubOrganization
GitHubOrganization
 SDKs
SDKs
 SDKs
SDKs
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits
RateLimits
 Support
Support

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: quandl
name: Quandl (Nasdaq Data Link)
description: Nasdaq Data Link (formerly Quandl) provides REST and streaming APIs for financial and economic data including
  time-series datasets, tabular datasets, and real-time market data feeds. Datasets cover stock prices, economic indicators,
  interest rates, commodities, equity fundamentals, options data, and alternative data sets.
type: Index
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/quandl.png
url: https://raw.githubusercontent.com/api-evangelist/quandl/refs/heads/main/apis.yml
tags:
- Finance
- Market Data
- Economic Data
- Time Series
- Streaming
created: '2026-03-18'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: quandl:nasdaq-data-link-tables-api
  name: Nasdaq Data Link Tables REST API
  description: Nasdaq Data Link Tables API provides access to tabular financial datasets including equity fundamentals, options
    data, and alternative data sets. Limited to 10,000 rows per call with pagination support up to 1,000,000 rows via the
    Python client.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.data.nasdaq.com/
  baseURL: https://data.nasdaq.com/api/v3
  tags:
  - Finance
  - Market Data
  - Tables
  - REST
  properties:
  - url: https://docs.data.nasdaq.com/
    type: Documentation
  - url: https://docs.data.nasdaq.com/docs/rate-limits-1
    type: RateLimits
- aid: quandl:nasdaq-cloud-data-service-api
  name: Nasdaq Cloud Data Service (NCDS) Streaming API
  description: Nasdaq Cloud Data Service (NCDS) provides streaming and REST APIs for real-time and delayed market data delivery
    including equities, options, and fixed income from Nasdaq exchange feeds.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/Nasdaq/NasdaqCloudDataService-REST-API
  tags:
  - Finance
  - Market Data
  - Streaming
  - Real-Time
  - REST
  tags_raw:
  - Finance
  - Market Data
  - Streaming
  - Real-time
  - REST
  properties:
  - url: https://github.com/Nasdaq/NasdaqCloudDataService-REST-API
    type: Documentation
  - url: https://github.com/Nasdaq/NasdaqCloudDataService-SDK-Python
    type: SDKs
  - url: https://github.com/Nasdaq/NasdaqCloudDataService-SDK-Java
    type: SDKs
- aid: quandl:quandl-databases-api
  name: Quandl (Nasdaq Data Link) Databases API
  description: Database catalog and metadata
  humanURL: https://docs.data.nasdaq.com/
  baseURL: https://data.nasdaq.com/api/v3
  tags:
  - Databases
  properties:
  - type: OpenAPI
    url: openapi/quandl-databases-api-openapi.yml
  - type: Documentation
    url: https://docs.data.nasdaq.com/
  - type: Reference
    url: https://docs.data.nasdaq.com/
  - type: GettingStarted
    url: https://docs.data.nasdaq.com/docs/getting-started
  - type: RateLimits
    url: https://docs.data.nasdaq.com/docs/rate-limits
  - type: SDKs
    url: https://docs.data.nasdaq.com/docs/python-installation
- aid: quandl:quandl-datasets-api
  name: Quandl (Nasdaq Data Link) Datasets API
  description: Time-series dataset retrieval
  humanURL: https://docs.data.nasdaq.com/
  baseURL: https://data.nasdaq.com/api/v3
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/quandl-datasets-api-openapi.yml
  - type: Documentation
    url: https://docs.data.nasdaq.com/
  - type: Reference
    url: https://docs.data.nasdaq.com/
  - type: GettingStarted
    url: https://docs.data.nasdaq.com/docs/getting-started
  - type: RateLimits
    url: https://docs.data.nasdaq.com/docs/rate-limits
  - type: SDKs
    url: https://docs.data.nasdaq.com/docs/python-installation
- aid: quandl:quandl-tables-api
  name: Quandl (Nasdaq Data Link) Tables API
  description: Tabular dataset retrieval
  humanURL: https://docs.data.nasdaq.com/
  baseURL: https://data.nasdaq.com/api/v3
  tags:
  - Tables
  properties:
  - type: OpenAPI
    url: openapi/quandl-tables-api-openapi.yml
  - type: Documentation
    url: https://docs.data.nasdaq.com/
  - type: Reference
    url: https://docs.data.nasdaq.com/
  - type: GettingStarted
    url: https://docs.data.nasdaq.com/docs/getting-started
  - type: RateLimits
    url: https://docs.data.nasdaq.com/docs/rate-limits
  - type: SDKs
    url: https://docs.data.nasdaq.com/docs/python-installation
common:
- type: AgenticAccess
  url: agentic-access/quandl-agentic-access.yml
- type: DomainSecurity
  url: security/quandl-domain-security.yml
- type: Authentication
  url: authentication/quandl-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/quandl
- url: https://data.nasdaq.com/
  type: Portal
- url: https://docs.data.nasdaq.com/
  type: Documentation
- url: https://docs.data.nasdaq.com/docs/getting-started
  type: GettingStarted
- url: https://docs.data.nasdaq.com/docs/rate-limits
  type: RateLimits
- url: https://data.nasdaq.com/
  type: Website
- url: https://docs.data.nasdaq.com/docs/contact-support
  type: Support
- url: https://github.com/Nasdaq
  type: GitHubOrganization
- url: https://github.com/quandl
  type: GitHubOrganization
- url: https://github.com/Nasdaq/data-link-python
  type: SDKs
- url: https://github.com/Nasdaq/NasdaqCloudDataService-SDK-Python
  type: SDKs
- url: https://github.com/Nasdaq/NasdaqCloudDataService-SDK-Java
  type: SDKs
- url: openapi/_original/nasdaq-data-link-timeseries-openapi.yml
  type: OpenAPI
- url: json-schema/nasdaq-data-link-dataset-schema.json
  type: JSONSchema
- url: json-ld/nasdaq-data-link-context.jsonld
  type: JSONLDContext
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com