lemon.markets

lemon.markets is a Berlin-based, BaFin-licensed investment firm that sells brokerage infrastructure as an API. Its Brokerage API lets fintechs, banks and platforms embed investing — account opening and KYC/identification, securities accounts, order placement and execution, trades, positions, transactions, withdrawals, settlements, corporate actions, income distributions, tax exemption orders (Freistellungsauftrag) and treasury products — without building or licensing a broker-dealer stack themselves. Coverage spans 10,000+ ETFs, ETPs, stocks, bonds and funds, and the platform supports omnibus, fully disclosed and BPO (business process outsourcing) operating models. The REST API is complemented by a webhook/event surface, an Idempotency-Key contract on order placement, and a sandbox environment with published test ISINs. API access is invite-only.

lemon.markets publishes 17 APIs on the APIs.io network, including Accounts: General API, Accounts: ID+V API, Batch Orders API, and 14 more. Tagged areas include Company, Fintech, Brokerage, Investing, and Trading.

The lemon.markets catalog on APIs.io includes 1 event-driven AsyncAPI specification.

lemon.markets’ developer surface includes authentication, sandbox, documentation, API reference, getting-started guide, changelog, support, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

43.4/100 developing ▬ flat Agent 55/100 agent native Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

17 APIs 1 MCP Servers

CompanyFintechBrokerageInvestingTradingEmbedded FinanceBanking as a ServiceSecuritiesWealth ManagementGermanyEurope

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 43.4/100 · developing

Contract Quality 13.3 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 3.6 / 17

Operational Transparency 2.5 / 11

Contract Governance 1.7 / 10

Discoverability 6.9 / 9

Regulatory Posture 6.3 / 15

Agent readiness — 55/100 · agent native

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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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 0 / 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/lemonmarkets: 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 17

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

Open Collections 18

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

MCP Servers 1

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

Get Started 3

Portal, sign-up, and the first successful call

Sandbox

Sandbox

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

Deprecation

ChangeLog

ChangeLog

StatusPage

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

Imprint

Imprint

Source (apis.yml)

aid: lemonmarkets
name: lemon.markets
description: lemon.markets is a Berlin-based, BaFin-licensed investment firm that sells brokerage infrastructure as an API.
  Its Brokerage API lets fintechs, banks and platforms embed investing — account opening and KYC/identification, securities
  accounts, order placement and execution, trades, positions, transactions, withdrawals, settlements, corporate actions, income
  distributions, tax exemption orders (Freistellungsauftrag) and treasury products — without building or licensing a broker-dealer
  stack themselves. Coverage spans 10,000+ ETFs, ETPs, stocks, bonds and funds, and the platform supports omnibus, fully disclosed
  and BPO (business process outsourcing) operating models. The REST API is complemented by a webhook/event surface, an Idempotency-Key
  contract on order placement, and a sandbox environment with published test ISINs. API access is invite-only.
url: https://raw.githubusercontent.com/api-evangelist/lemonmarkets/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://www.lemon.markets/favicon.ico
x-type: company
x-source: vc-portfolio
x-backed-by:
- creandum
x-tier: profiled
x-tier-reason: enrichment-pipeline
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-08'
tags:
- Company
- Fintech
- Brokerage
- Investing
- Trading
- Embedded Finance
- Banking as a Service
- Securities
- Wealth Management
- Germany
- Europe
apis:
- aid: lemonmarkets:lemonmarkets-accounts-general-api
  name: 'lemon.markets Accounts: General API'
  description: 'The Accounts: General API from lemon.markets — 6 operation(s) for accounts: general.'
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - 'Accounts: General'
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-accounts-general-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-accounts-id-v-api
  name: 'lemon.markets Accounts: ID+V API'
  description: 'The Accounts: ID+V API from lemon.markets — 3 operation(s) for accounts: id+v.'
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - 'Accounts: ID+V'
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-accounts-id-v-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-batch-orders-api
  name: lemon.markets Batch Orders API
  description: The Batch Orders API from lemon.markets — 4 operation(s) for batch orders.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Batch Orders
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-batch-orders-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-businesses-api
  name: lemon.markets Businesses API
  description: The Businesses API from lemon.markets — 5 operation(s) for businesses.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Businesses
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-businesses-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-cash-settlement-api
  name: lemon.markets Cash Settlement API
  description: The Cash Settlement API from lemon.markets — 5 operation(s) for cash settlement.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Cash Settlement
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-cash-settlement-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-corporate-actions-api
  name: lemon.markets Corporate Actions API
  description: The Corporate Actions API from lemon.markets — 6 operation(s) for corporate actions.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Corporate Actions
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-corporate-actions-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-documents-api
  name: lemon.markets Documents API
  description: The Documents API from lemon.markets — 4 operation(s) for documents.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-documents-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-events-webhooks-api
  name: lemon.markets Events + Webhooks API
  description: The Events + Webhooks API from lemon.markets — 3 operation(s) for events + webhooks.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Events + Webhooks
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-events-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-instruments-api
  name: lemon.markets Instruments API
  description: The Instruments API from lemon.markets — 4 operation(s) for instruments.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Instruments
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-instruments-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-money-positions-api
  name: lemon.markets Money + Positions API
  description: The Money + Positions API from lemon.markets — 9 operation(s) for money + positions.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Money + Positions
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-money-positions-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-orders-api
  name: lemon.markets Orders API
  description: The Orders API from lemon.markets — 4 operation(s) for orders.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Order
  tags_raw:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-orders-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-persons-api
  name: lemon.markets Persons API
  description: The Persons API from lemon.markets — 4 operation(s) for persons.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Persons
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-persons-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-securities-accounts-api
  name: lemon.markets Securities Accounts API
  description: The Securities Accounts API from lemon.markets — 2 operation(s) for securities accounts.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Securities Accounts
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-securities-accounts-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-taxes-api
  name: lemon.markets Taxes API
  description: The Taxes API from lemon.markets — 4 operation(s) for taxes.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Taxes
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-taxes-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-trades-api
  name: lemon.markets Trades API
  description: The Trades API from lemon.markets — 2 operation(s) for trades.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Trades
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-trades-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-treasury-mandates-api
  name: lemon.markets Treasury Mandates API
  description: The Treasury Mandates API from lemon.markets — 9 operation(s) for treasury mandates.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Treasury Mandates
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-treasury-mandates-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- aid: lemonmarkets:lemonmarkets-workflows-api
  name: lemon.markets Workflows API
  description: Use workflows to perform repetitive tasks automatically.
  humanURL: https://developer.lemon.markets/
  baseURL: https://api.lemon.markets/v1
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/lemonmarkets-workflows-api-openapi.yml
  - type: Documentation
    url: https://developer.lemon.markets/docs
  - type: APIReference
    url: https://developer.lemon.markets/reference
  - type: GettingStarted
    url: https://developer.lemon.markets/docs/getting-started
  - type: ChangeLog
    url: https://developer.lemon.markets/changelog
  - type: Sandbox
    url: sandbox/lemonmarkets-sandbox.yml
  - type: Webhooks
    url: asyncapi/lemonmarkets-brokerage-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/lemonmarkets-agentic-access.yml
- type: DomainSecurity
  url: security/lemonmarkets-domain-security.yml
- type: Authentication
  url: authentication/lemonmarkets-authentication.yml
- type: Conventions
  url: conventions/lemonmarkets-conventions.yml
- type: Idempotency
  url: conventions/lemonmarkets-conventions.yml
- type: ErrorCatalog
  url: errors/lemonmarkets-problem-types.yml
- type: Lifecycle
  url: lifecycle/lemonmarkets-lifecycle.yml
- type: Deprecation
  url: https://developer.lemon.markets/changelog
- type: Conformance
  url: conformance/lemonmarkets-conformance.yml
- type: DataModel
  url: data-model/lemonmarkets-data-model.yml
- type: Packages
  url: packages/lemonmarkets-packages.yml
- type: WellKnown
  url: well-known/lemonmarkets-well-known.yml
- type: MCPServer
  url: mcp/lemonmarkets-mcp.yml
- type: LLMsTxt
  url: llms/lemonmarkets-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/lemonmarkets-brokerage-webhooks.yml
- type: Sandbox
  url: sandbox/lemonmarkets-sandbox.yml
- type: Overlay
  url: overlays/lemonmarkets-brokerage-overlay.yaml
- type: Website
  url: https://www.lemon.markets/
- type: DeveloperPortal
  url: https://developer.lemon.markets/
- type: Documentation
  url: https://developer.lemon.markets/docs
- type: APIReference
  url: https://developer.lemon.markets/reference
- type: GettingStarted
  url: https://developer.lemon.markets/docs/getting-started
- type: ChangeLog
  url: https://developer.lemon.markets/changelog
- type: ChangeLog
  url: changelog/lemonmarkets-changelog.yml
  name: Structured changelog artifact
- type: StatusPage
  url: https://status.lemon.markets/
- type: GitHubOrganization
  url: https://github.com/lemon-markets
- type: Support
  url: https://www.lemon.markets/en-de/contact
- type: TermsOfService
  url: https://www.lemon.markets/en-de/terms-of-use
- type: PrivacyPolicy
  url: https://www.lemon.markets/en-de/privacy-policy
- type: Imprint
  url: https://www.lemon.markets/en-de/imprint
- type: LinkedIn
  url: https://www.linkedin.com/company/lemon-markets/
- type: Blog
  url: https://lemon.markets/en-de/blog
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence
x-merged-from:
- lemon-markets