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 5 API contracts indexed on the APIs.io network, including Databases API, Datasets API, Tables API, and 2 more. 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 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.3/100 thin ▬ flat Agent 28/100 agent aware Heartbeat 27/100 dormant Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Finance Market Data Economic Data Time Series Streaming

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 33.3/100 · thin

Contract Quality 11.8 / 21

Developer Ergonomics 8.5 / 17

Access Clarity 0.9 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.2 / 15

Agent readiness — 28/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 5.3 — up to +18.9 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points
Contract Quality scores 55.6 — up to +11.1 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/quandl/apis.yml: open an issue on github.com/api-evangelist/quandl to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

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 4

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

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

Quandl (Nasdaq Data Link) API pricing

Not yet checked against Quandl (Nasdaq Data Link)'s own pricing page. Compiled by API Evangelist on 2026-05-05 from data.nasdaq.com/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Contact Sales / Per-Dataset Subscription enterprise	Free

Plan details, limits and sources →

Rate limits

Per-Account Throttle: see Nasdaq Data Link operational guidance varies

Compiled by API Evangelist, not yet checked against Quandl (Nasdaq Data Link)'s documentation. Rate-limit details →

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

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Quandl (Nasdaq Data Link)

SLA

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) — jsonschema 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

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  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:
  - Database
  tags_raw:
  - 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: Plans
  url: plans/quandl-plans-pricing.yml
- type: FinOps
  url: finops/quandl-finops.yml
- 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

Quandl (Nasdaq Data Link) API — frequently asked questions

Does Quandl (Nasdaq Data Link) have an API?

Yes. APIs.io lists 5 APIs from Quandl (Nasdaq Data Link), including Nasdaq Data Link Tables REST API, Nasdaq Cloud Data Service (NCDS) Streaming API and Quandl (Nasdaq Data Link) Databases API, and 2 more.

Is there an OpenAPI specification for the Quandl (Nasdaq Data Link) API?

Yes. APIs.io indexes 3 OpenAPI specifications for Quandl (Nasdaq Data Link), each linked for download from this page.

How do I authenticate with the Quandl (Nasdaq Data Link) API?

Quandl (Nasdaq Data Link) uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Quandl Authentication.

How much does the Quandl (Nasdaq Data Link) API cost?

APIs.io lists 1 pricing plan for Quandl (Nasdaq Data Link), with each plan's price, limits and inclusions under Pricing on this page.

Is the Quandl (Nasdaq Data Link) API ready for AI agents?

Quandl (Nasdaq Data Link) has a Kin Score of 33.3 out of 100 (thin) and an Agent Readiness score of 27.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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