SiftingIO

Cross-asset market data APIs covering US equities, forex, cryptocurrency, DeFi/on-chain, commodities, and SEC/EDGAR fundamentals, aggregated across venues and normalized into one JSON schema so every asset class shares the same fields, auth model and integration flow. Delivered over REST (37 operations under a public OpenAPI 3.1 contract), a WebSocket stream described by a public AsyncAPI 3.0 contract, and a documented FIX 4.4 market-data feed. Fundamentals cover filings, filing-text extraction and risk-factor diffs, XBRL financials, ratios, insiders, ownership and 13F holdings; reference data covers market status, hours and holiday calendars; derived data covers technical signals and on-chain TVL. Official Go, Python and JavaScript SDKs, an open-source (locally-run) MCP server with 36 tools, and a provider-published agent ruleset. Operated by SaltingIO LLC, a Wyoming company; explicitly not a broker, exchange or trading venue.

SiftingIO publishes 13 API contracts indexed on the APIs.io network, including Live Stream, Commodities API, Convert API, and 10 more. Tagged areas include Financial market data, Stocks/equities, Foreign Exchange, Cryptocurrency, and DeFi/on-chain.

The SiftingIO catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

SiftingIO’s developer surface includes authentication, changelog, sandbox, documentation, API reference, getting-started guide, support, and 46 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

65.5/100 strong ▬ flat Agent 43/100 agent native Front door AI 3/6 light Heartbeat 76/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 2 MCP Servers 4 Agent Skills

Financial market data Stocks/equities Foreign Exchange CryptocurrencyDeFi/on-chainCommodities SEC Filings XBRL Fundamentals FintechQuant/trading infrastructureReal-Time Streaming WebSocket FIX Financial Data Market Data Stocks DeFi Real-Time REST API MCP Server Agent-Native

Kin Score

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

Composite quality — 65.5/100 · strong

Contract Quality 12.5 / 21

Developer Ergonomics 14.2 / 17

Access Clarity 14.3 / 17

Operational Transparency 6.4 / 11

Contract Governance 1.9 / 10

Discoverability 5.4 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 43/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
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)
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Well-Known Catalog +4 pts — common[].type includes WellKnown, APICatalog, or api-catalog

1 more unmet check in the Agent Readiness table above.

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

Contract Quality scores 59.0 — up to +10.3 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Operational Transparency scores 57.9 — up to +5.5 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/siftingio/apis.yml: open an issue on github.com/api-evangelist/siftingio 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
RegTech, AML/KYC and Money Transmission	distribution	19.2 (thin)	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 6

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.

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

XBRL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

Agent Skills

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

AsyncAPI

measured — observed by APIs.io (published)

APIs 13

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

SiftingIO Live Stream

WebSocket streaming API for live market data, described by an AsyncAPI 3.0 contract. Also offers a documented FIX API.

SiftingIO MCP Server

LOCALLY-RUN MCP server, not a hosted endpoint. The client launches it (`npx -y siftingio-mcp`, or the Python package) and it runs on the user's own machine, reading the key from...

SiftingIO Commodities API

Historical OHLC bars for commodities (metals, energy, industrials).

SiftingIO Convert API

Live currency and token conversion across forex and crypto.

SiftingIO Crypto API

Historical OHLCV bars for crypto symbols.

SiftingIO DEX API

On-chain wallet portfolios and historical DEX bars.

SiftingIO Filers API

13F institutional holdings.

SiftingIO Forex API

Historical OHLC bars for FX pairs.

SiftingIO Live API

Live market data read from the engine's latest snapshot.

SiftingIO Markets API

Market catalog, status, hours, and holiday calendars.

SiftingIO Signals API

Technical-analysis signals (live and historical) across stocks, forex, crypto, and commodities.

SiftingIO Stocks API

US-equity fundamentals (SEC) and historical bars.

SiftingIO Economic Calendar API

US macro economic events.

Scroll for all 13

MCP Servers 2

Model Context Protocol servers that expose these APIs to AI agents.

SiftingIO MCP Server

MCP SERVER

SiftingIO MCP Server

SiftingIO market data: live crypto/forex/metals prices, OHLCV bars, SEC fundamentals, 13F data. Returns the same normalized shapes as the REST API, with structuredContent alongs...

MCP SERVER

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Research a US company's fundamentals from SEC filings

AGENT SKILL

Pull live prices and historical OHLCV bars across asset classes

AGENT SKILL

Check whether a market is open and read its calendar

AGENT SKILL

Read technical signals and on-chain positions

AGENT SKILL

SiftingIO API pricing

Prices published by SiftingIO, read 2026-10-28 from sifting.io/pricing.

Plan	Price
Free	$0 forever per market Includes: 10,000 REST calls / month, 1 WS connection · 5 symbol subs, 1 API key · 1 team member
Builder	$79/ mo per market Includes: 250,000 REST calls / month, 3 WS connections · 100 symbol subs, 3 API keys · 3 team members
Pro	$239/ mo per market Includes: 5,000,000 REST calls / month, 10 WS connections · 1,000 symbol subs, 10 API keys · 10 team members
Ultra	$639/ mo per market Includes: Unlimited REST API calls, 50 WS connections · Unlimited symbol subs, 20 API keys · 25 team members
DEX & DeFi Pro	$320/ mo per market Includes: Pro tier limits
US Stocks Pro	$320/ mo per market Includes: Pro tier limits
Enterprise	Talk to sales Includes: Custom call quotas, 99.95% SLA + credits, SSO, SCIM, dedicated support
Add-on · Extra REST calls	from $79/ mo per 1M calls

All 12 plans, limits and sources →

Rate limits

: 10000 month
: 60 minute
: 250000 month

All 9 limits →

Billed by: market · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Siftingio Plans Pricing

12 plans

PLANS

Siftingio Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Siftingio Rate Limits

9 limits

RATE LIMITS

Service Levels 1

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

SiftingIO

SLA

FinOps 1

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

Siftingio Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

SiftingIO Live Stream

WebSocket API for live market data. Connect to `wss://stream.sifting.io/ws/v1?key=sft_...` — the API key is passed as the `key` query parameter (the only WebSocket auth method)....

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SiftingIO API Rules

63 rules · 56 errors 6 warnings 1 info

SPECTRAL

OpenAPI Overlays 11

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Siftingio Commodities Overlay

3 actions · update · siftingio-commodities-api-openapi.yml

DERIVED

Siftingio Convert Overlay

2 actions · update · siftingio-convert-api-openapi.yml

DERIVED

Siftingio Crypto Overlay

3 actions · update · siftingio-crypto-api-openapi.yml

DERIVED

Siftingio Dex Overlay

3 actions · update · siftingio-dex-api-openapi.yml

DERIVED

Siftingio Economiccalendar Overlay

2 actions · update · siftingio-economiccalendar-api-openapi.yml

DERIVED

Siftingio Filers Overlay

2 actions · update · siftingio-filers-api-openapi.yml

DERIVED

Siftingio Forex Overlay

3 actions · update · siftingio-forex-api-openapi.yml

DERIVED

Siftingio Live Overlay

3 actions · update · siftingio-live-api-openapi.yml

DERIVED

Siftingio Markets Overlay

2 actions · update · siftingio-markets-api-openapi.yml

DERIVED

Siftingio Signals Overlay

2 actions · update · siftingio-signals-api-openapi.yml

DERIVED

Siftingio Stocks Overlay

3 actions · update · siftingio-stocks-api-openapi.yml

DERIVED

Scroll for all 11

Security Posture 2

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

Siftingio Authentication

apiKey · 3 schemes

SECURITY

Siftingio Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Siftingio Agentic Access

37 operations

37 operations · 0 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Login

Documentation 4

Reference material describing how the API behaves

Documentation

APIReference

OpenAPI

AsyncAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

DataModel

Lifecycle

Components

Build 6

SDKs, sample code, and the tooling you integrate with

Packages

SDKs

SDKs

ToolCrosswalk

Postman

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 7

Status, limits, changes, and where to get help

StatusPage

Deprecation

ChangeLog

ChangeLog

RateLimits

Support

Community

Scroll for all 7

Commercial 5

Pricing, plans, and the legal terms of use

License

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

BlogRSS

BlogRSS

Website

Website

Blog

Blog

Other 11

Properties that don't map to a standard resource type

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Scroll for all 11

Source (apis.yml)

name: SiftingIO
description: Cross-asset market data APIs covering US equities, forex, cryptocurrency, DeFi/on-chain, commodities, and SEC/EDGAR
  fundamentals, aggregated across venues and normalized into one JSON schema so every asset class shares the same fields,
  auth model and integration flow. Delivered over REST (37 operations under a public OpenAPI 3.1 contract), a WebSocket stream
  described by a public AsyncAPI 3.0 contract, and a documented FIX 4.4 market-data feed. Fundamentals cover filings, filing-text
  extraction and risk-factor diffs, XBRL financials, ratios, insiders, ownership and 13F holdings; reference data covers market
  status, hours and holiday calendars; derived data covers technical signals and on-chain TVL. Official Go, Python and JavaScript
  SDKs, an open-source (locally-run) MCP server with 36 tools, and a provider-published agent ruleset. Operated by SaltingIO
  LLC, a Wyoming company; explicitly not a broker, exchange or trading venue.
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - pricing
  - repository-unlicensed
  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: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://sifting.io/logo.svg
url: https://raw.githubusercontent.com/api-evangelist/siftingio/refs/heads/main/apis.yml
created: '2026-08-17'
modified: '2026-10-06'
specificationVersion: '0.23'
tags:
- Financial market data
- Stocks/equities
- Foreign Exchange
- Cryptocurrency
- DeFi/on-chain
- Commodities
- SEC Filings
- XBRL
- Fundamentals
- Fintech
- Quant/trading infrastructure
- Real-Time Streaming
- WebSocket
- FIX
- Financial Data
- Market Data
- Stocks
- DeFi
- Real-Time
- REST API
- MCP Server
- Agent-Native
tags_raw:
- Financial market data
- Stocks/equities
- Forex
- Cryptocurrency
- DeFi/on-chain
- Commodities
- SEC filings
- XBRL
- Fundamentals
- Fintech
- Quant/trading infrastructure
- Real-time streaming
- WebSocket
- FIX
- financial data
- market data
- stocks
- forex
- cryptocurrency
- DeFi
- commodities
- real-time
- websocket
- REST API
- MCP server
- agent-native
apis:
- name: SiftingIO Live Stream
  description: WebSocket streaming API for live market data, described by an AsyncAPI 3.0 contract. Also offers a documented
    FIX API.
  humanURL: https://sifting.io/docs/fix-api
  baseURL: wss://stream.sifting.io/ws/v1
  tags:
  - Financial market data
  - Stocks/equities
  - Foreign Exchange
  - Cryptocurrency
  - DeFi/on-chain
  - Commodities
  - SEC Filings
  - XBRL
  - Fundamentals
  - Fintech
  - Quant/trading infrastructure
  - Real-Time Streaming
  - WebSocket
  - FIX
  tags_raw:
  - Financial market data
  - Stocks/equities
  - Forex
  - Cryptocurrency
  - DeFi/on-chain
  - Commodities
  - SEC filings
  - XBRL
  - Fundamentals
  - Fintech
  - Quant/trading infrastructure
  - Real-time streaming
  - WebSocket
  - FIX
  properties:
  - type: AsyncAPI
    url: asyncapi/siftingio-asyncapi.yaml
  - type: AsyncAPI
    url: https://sifting.io/asyncapi.yaml
  - type: Documentation
    url: https://sifting.io/docs/fix-api
- name: SiftingIO MCP Server
  description: LOCALLY-RUN MCP server, not a hosted endpoint. The client launches it (`npx -y siftingio-mcp`, or the Python
    package) and it runs on the user's own machine, reading the key from SIFTING_API_KEY. 36 tools cover forex, crypto, stocks,
    commodities, SEC fundamentals and on-chain DEX data. MIT licensed, with first-party TypeScript and Python implementations.
  humanURL: https://sifting.io/integrations/mcp
  tags:
  - Financial market data
  - Stocks/equities
  - Foreign Exchange
  - Cryptocurrency
  - DeFi/on-chain
  - Commodities
  - SEC Filings
  - XBRL
  - Fundamentals
  - Fintech
  - Quant/trading infrastructure
  - Real-Time Streaming
  - WebSocket
  - FIX
  tags_raw:
  - Financial market data
  - Stocks/equities
  - Forex
  - Cryptocurrency
  - DeFi/on-chain
  - Commodities
  - SEC filings
  - XBRL
  - Fundamentals
  - Fintech
  - Quant/trading infrastructure
  - Real-time streaming
  - WebSocket
  - FIX
  properties:
  - type: MCPServer
    url: https://sifting.io/integrations/mcp
  - type: SourceCode
    url: https://github.com/SiftingIO/siftingio-mcp
  - type: SourceCode
    url: https://github.com/SiftingIO/siftingio-mcp-python
  - type: Documentation
    url: https://sifting.io/integrations/mcp
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: LLMsTxt
    url: https://sifting.io/llms-full.txt
  - type: AgentSkill
    url: https://github.com/SiftingIO/siftingio-ai-rules
- aid: siftingio:siftingio-commodities-api
  name: SiftingIO Commodities API
  description: Historical OHLC bars for commodities (metals, energy, industrials).
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Commodities
  properties:
  - type: OpenAPI
    url: openapi/siftingio-commodities-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-convert-api
  name: SiftingIO Convert API
  description: Live currency and token conversion across forex and crypto.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Convert
  properties:
  - type: OpenAPI
    url: openapi/siftingio-convert-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-crypto-api
  name: SiftingIO Crypto API
  description: Historical OHLCV bars for crypto symbols.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Cryptocurrency
  tags_raw:
  - Crypto
  properties:
  - type: OpenAPI
    url: openapi/siftingio-crypto-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-dex-api
  name: SiftingIO DEX API
  description: On-chain wallet portfolios and historical DEX bars.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Decentralized Exchange
  tags_raw:
  - DEX
  properties:
  - type: OpenAPI
    url: openapi/siftingio-dex-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-filers-api
  name: SiftingIO Filers API
  description: 13F institutional holdings.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Filers
  properties:
  - type: OpenAPI
    url: openapi/siftingio-filers-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-forex-api
  name: SiftingIO Forex API
  description: Historical OHLC bars for FX pairs.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Foreign Exchange
  tags_raw:
  - Forex
  properties:
  - type: OpenAPI
    url: openapi/siftingio-forex-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-live-api
  name: SiftingIO Live API
  description: Live market data read from the engine's latest snapshot.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Live
  properties:
  - type: OpenAPI
    url: openapi/siftingio-live-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-markets-api
  name: SiftingIO Markets API
  description: Market catalog, status, hours, and holiday calendars.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Markets
  properties:
  - type: OpenAPI
    url: openapi/siftingio-markets-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-signals-api
  name: SiftingIO Signals API
  description: Technical-analysis signals (live and historical) across stocks, forex, crypto, and commodities.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Signals
  properties:
  - type: OpenAPI
    url: openapi/siftingio-signals-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-stocks-api
  name: SiftingIO Stocks API
  description: US-equity fundamentals (SEC) and historical bars.
  humanURL: https://sifting.io/docs
  baseURL: https://api.sifting.io
  tags:
  - Stocks
  properties:
  - type: OpenAPI
    url: openapi/siftingio-stocks-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
- aid: siftingio:siftingio-economic-calendar-api
  name: SiftingIO Economic Calendar API
  description: US macro economic events.
  humanURL: https://sifting.io/docs/fix-api
  baseURL: wss://stream.sifting.io/ws/v1
  tags:
  - Economic Calendar
  properties:
  - type: OpenAPI
    url: openapi/siftingio-economic-calendar-api-openapi.yml
  - type: PostmanCollection
    url: https://www.postman.com/siftingio/siftingio-market-data-api
  - type: Documentation
    url: https://sifting.io/docs
  - type: Documentation
    url: https://sifting.io/docs/quickstart
  - type: LLMsTxt
    url: https://sifting.io/llms.txt
  - type: Documentation
    url: https://sifting.io/integrations/mcp
maintainers:
- FN: SiftingIO
  email: hello@sifting.io
  url: https://sifting.io
- FN: SaltingIO LLC
  email: enterprise@sifting.io
  url: https://github.com/SiftingIO
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 90
  at: '2026-08-17T11:48:02.881Z'
common:
- url: https://sifting.io/blog/feed.xml
  type: BlogRSS
- type: License
  name: MIT
  url: https://github.com/SiftingIO/siftingio-mcp/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/siftingio-agentic-access.yml
- type: DomainSecurity
  url: security/siftingio-domain-security.yml
- type: Authentication
  url: authentication/siftingio-authentication.yml
- type: Packages
  url: packages/siftingio-packages.yml
- type: SDKs
  url: packages/siftingio-packages.yml
- type: SDKs
  name: SDKs & libraries
  url: https://sifting.io/sdks
- type: LLMsTxt
  name: llms.txt (verbatim)
  url: llms/siftingio-llms.txt
- type: MCPServer
  url: mcp/siftingio-mcp.yml
- type: ToolCrosswalk
  url: mcp/siftingio-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Conventions
  url: conventions/siftingio-conventions.yml
- type: ErrorCatalog
  url: errors/siftingio-problem-types.yml
- type: Conformance
  url: conformance/siftingio-conformance.yml
- type: DataModel
  url: data-model/siftingio-data-model.yml
- type: Lifecycle
  url: lifecycle/siftingio-lifecycle.yml
- type: StatusPage
  url: https://siftingio.instatus.com/
- type: Deprecation
  name: Versioning & deprecation policy
  url: https://sifting.io/docs/quickstart
- type: ChangeLog
  url: changelog/siftingio-changelog.yml
- type: ChangeLog
  name: Changelog
  url: https://sifting.io/changelog
- type: Plans
  url: plans/siftingio-plans-pricing.yml
- type: RateLimits
  url: rate-limits/siftingio-rate-limits.yml
- type: Sandbox
  url: sandbox/siftingio-sandbox.yml
- type: Components
  url: components/siftingio-components.yml
- type: Overlay
  name: Commodities API enhancements
  url: overlays/siftingio-commodities-overlay.yaml
- type: Overlay
  name: Convert API enhancements
  url: overlays/siftingio-convert-overlay.yaml
- type: Overlay
  name: Crypto API enhancements
  url: overlays/siftingio-crypto-overlay.yaml
- type: Overlay
  name: DEX API enhancements
  url: overlays/siftingio-dex-overlay.yaml
- type: Overlay
  name: Economic Calendar API enhancements
  url: overlays/siftingio-economiccalendar-overlay.yaml
- type: Overlay
  name: Filers API enhancements
  url: overlays/siftingio-filers-overlay.yaml
- type: Overlay
  name: Forex API enhancements
  url: overlays/siftingio-forex-overlay.yaml
- type: Overlay
  name: Live API enhancements
  url: overlays/siftingio-live-overlay.yaml
- type: Overlay
  name: Markets API enhancements
  url: overlays/siftingio-markets-overlay.yaml
- type: Overlay
  name: Signals API enhancements
  url: overlays/siftingio-signals-overlay.yaml
- type: Overlay
  name: Stocks API enhancements
  url: overlays/siftingio-stocks-overlay.yaml
- type: Website
  url: https://sifting.io
- type: DeveloperPortal
  url: https://sifting.io/docs
- type: Documentation
  url: https://sifting.io/docs
- type: APIReference
  url: https://sifting.io/docs
- type: GettingStarted
  name: Quickstart
  url: https://sifting.io/docs/quickstart
- type: OpenAPI
  name: OpenAPI 3.1 (provider-hosted, canonical)
  url: https://sifting.io/openapi.yaml
- type: AsyncAPI
  name: AsyncAPI 3.0 (provider-hosted, canonical)
  url: https://sifting.io/asyncapi.yaml
- type: Postman
  name: Official Postman collection
  url: https://www.postman.com/siftingio/siftingio-market-data-api
- type: Support
  url: https://sifting.io/contact
- type: Community
  name: Slack community
  url: https://sifting.io/community/slack
- type: Blog
  url: https://sifting.io/blog
- type: GitHubOrganization
  url: https://github.com/SiftingIO
- type: Pricing
  url: https://sifting.io/pricing
- type: SignUp
  url: https://sifting.io/register
- type: Login
  url: https://sifting.io/login
- type: TermsOfService
  url: https://sifting.io/legal/terms-of-use
- type: PrivacyPolicy
  url: https://sifting.io/legal/privacy-policy
x-enrichment:
  date: '2026-08-17'
  status: enriched
  artifacts_added: 35
  pass: local-v1

SiftingIO API — frequently asked questions

Does SiftingIO have an API?

Yes. APIs.io lists 13 APIs from SiftingIO, including SiftingIO Live Stream, SiftingIO MCP Server and SiftingIO Commodities API, and 10 more.

Is there an OpenAPI specification for the SiftingIO API?

Yes. APIs.io indexes 11 OpenAPI specifications for SiftingIO, each linked for download from this page.

How do I authenticate with the SiftingIO API?

SiftingIO uses bearer-token authentication (apiKey · 3 schemes). The details are profiled on APIs.io as Siftingio Authentication.

How much does the SiftingIO API cost?

SiftingIO publishes its prices; its Free plan is $0 forever per market as of 2026-10-28. APIs.io lists 12 pricing plans for SiftingIO, with each plan's price, limits and inclusions under Pricing on this page.

Does SiftingIO have an MCP server?

Yes. APIs.io lists 2 MCP servers for SiftingIO: SiftingIO market data: live crypto/forex/metals prices, OHLCV bars, SEC fundamentals, 13F data. Returns the same normalized shapes as the REST API, with structuredContent alongside the text on the sna

Is the SiftingIO API ready for AI agents?

SiftingIO has a Kin Score of 65.5 out of 100 (strong) and an Agent Readiness score of 43.2 (agent-native), scored by API Evangelist on 2026-11-06.

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