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

39.0/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaid

1 APIs

Finance Market Data Economic Data Time Series Streaming

Kin Score

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

Composite quality — 39.0/100 · thin

Contract Quality 13.0 / 21

Developer Ergonomics 10.3 / 17

Access Clarity 2.2 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.0 / 10

Discoverability 5.0 / 9

Regulatory Posture 5.7 / 15

Agent readiness — 26/100 · agent aware

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/. 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/quandl: 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 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

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

Website

Website

Source (apis.yml)

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
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  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

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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/quandl"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/quandl/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/quandl/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.