aid: xpansiv
name: Xpansiv
description: 'Xpansiv is market infrastructure for global environmental and energy
  commodities — carbon credits, renewable energy certificates, water, low-carbon fuels
  and recycled materials. It operates CBL, the largest spot exchange for environmental
  commodities, the Evolution Markets and OTX brokerage and execution desks, the H2OX
  water market and the ACE and JSEV carbon platforms, alongside the environmental
  registries it acquired with APX in 2022 — NAR (North American Renewables Registry),
  TIGR, I-REC, I-TRACK-G and the Xpansiv-powered digital fuels registries. Its public
  developer portal at developer.xpansiv.com publishes eleven OpenAPI descriptions across
  Xpansiv Connect (environmental commodity portfolio, retirement and transfer), Xpansiv
  Managed Solutions, the NAR and TIGR registry client APIs, the Optimal Outcomes suite
  and the APX Power Markets file registry, plus a FIX 4.4 marketplace protocol
  specification, Xpansiv Data market-data APIs and a first-party Python SDK.'
url: https://raw.githubusercontent.com/api-evangelist/xpansiv/refs/heads/main/apis.yml
image: https://kinlane-productions2.s3.amazonaws.com/apis-io/apis-io-logo.png
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-04'
modified: '2026-09-04'
tags:
- Company
- Environmental Commodities
- Carbon Markets
- Renewable Energy Certificates
- Registries
- Market Data
- Trading
- Energy
- Sustainability
- Climate
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: xpansiv-connect
  name: Xpansiv Connect API
  description: Xpansiv Connect exposes environmental commodity account, portfolio,
    exchange, forward deal, issuance, project, reference data, report, retirement,
    split lot and transfer operations over REST. Bearer tokens are issued by the
    Xpansiv authorization server at auth.xpansiv.com.
  humanURL: https://developer.xpansiv.com/developer-portal/xpansiv-connect
  baseURL: https://connect.xpansiv.com/app/api/v1
  tags:
  - Carbon Markets
  - Retirements
  - Portfolio
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-connect-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/xpansiv-connect
  - type: GettingStarted
    url: https://developer.xpansiv.com/developer-portal/xpansiv-connect/getting-started
  - type: Overlay
    url: overlays/xpansiv-connect-overlay.yaml
- aid: xpansiv-managed-solutions
  name: Xpansiv Managed Solutions API
  description: Access facilities, transactions, meter readings, clean transportation,
    market, qualified reporting entity, building type, remote data collector and
    utility data from an Xpansiv Managed Solutions account using a bearer API key
    generated on the account API Access page.
  humanURL: https://developer.xpansiv.com/developer-portal/xpansiv-managed-solutions
  baseURL: https://www.ms.xpansiv.com/app/api/v1
  tags:
  - Renewable Energy Certificates
  - Meter Data
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-managed-solutions-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/xpansiv-managed-solutions
  - type: Authentication
    url: https://developer.xpansiv.com/developer-portal/xpansiv-managed-solutions/authorization
  - type: Overlay
    url: overlays/xpansiv-managed-solutions-overlay.yaml
- aid: xpansiv-data
  name: Xpansiv Data API
  description: Real-time, end-of-day and historical transaction-based market data
    for environmental and energy commodities, sourced from CBL and global
    intermediaries including Evolution Markets. Delivered as time series, data-lake
    file groups and NCSV downloads over a JWT-authenticated REST API, with a
    first-party Python SDK.
  humanURL: https://developer.xpansiv.com/developer-portal/xpansiv-data
  baseURL: https://api.data.xpansiv.com
  tags:
  - Market Data
  - Time Series
  properties:
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/xpansiv-data
  - type: Authentication
    url: https://developer.xpansiv.com/developer-portal/xpansiv-data/authorization
  - type: ErrorCatalog
    url: https://developer.xpansiv.com/developer-portal/xpansiv-data/errors
  - type: SDKs
    url: https://developer.xpansiv.com/developer-portal/xpansiv-data/sdk
- aid: xpansiv-nar-registry
  name: NAR Registry Client API
  description: The North American Renewables Registry client API for retrieving and
    transacting NAR monthly vintage renewable energy certificates — account, ledger,
    subaccount and system operations behind an OAuth2 password-grant JWT.
  humanURL: https://developer.xpansiv.com/developer-portal/nar-registry
  baseURL: https://narenewables2.apx.com/ClientAPI
  tags:
  - Registries
  - Renewable Energy Certificates
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-nar-registry-client-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/nar-registry
  - type: Authentication
    url: https://developer.xpansiv.com/developer-portal/nar-registry/authentication
  - type: Overlay
    url: overlays/xpansiv-nar-registry-client-overlay.yaml
- aid: xpansiv-tigr-registry
  name: TIGRS Registry Client API
  description: The Tradable Instrument for Global Renewables (TIGR) registry client
    API for retrieving and retiring TIGR certificates — corporate entity, ledger,
    subaccount and system operations behind an OAuth2 password-grant JWT.
  humanURL: https://developer.xpansiv.com/developer-portal/tigr-registry
  baseURL: https://tigrsregistry.apx.com/clientapi
  tags:
  - Registries
  - Renewable Energy Certificates
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-tigr-registry-client-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/tigr-registry
  - type: Authentication
    url: https://developer.xpansiv.com/developer-portal/tigr-registry/authentication
  - type: Overlay
    url: overlays/xpansiv-tigr-registry-client-overlay.yaml
- aid: xpansiv-optimal-outcomes
  name: Xpansiv Optimal Outcomes APIs
  description: The Optimal Outcomes suite — a system health API, a file registry, a
    meter-data telemetry API, a reporting service, a resource API and a transfer
    position external API for viewing and managing environmental instruments,
    transfer and retirement batches, ledgers and subaccounts.
  humanURL: https://developer.xpansiv.com/developer-portal/optimal-outcomes
  baseURL: https://optimalapi-ext.apx.com
  tags:
  - Registries
  - Telemetry
  - Reporting
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-optimal-system-openapi.yml
  - type: OpenAPI
    url: openapi/xpansiv-optimal-file-registry-openapi.yml
  - type: OpenAPI
    url: openapi/xpansiv-optimal-telemetry-openapi.yml
  - type: OpenAPI
    url: openapi/xpansiv-optimal-reporting-openapi.yml
  - type: OpenAPI
    url: openapi/xpansiv-optimal-resource-openapi.yml
  - type: OpenAPI
    url: openapi/xpansiv-optimal-transfer-position-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/optimal-outcomes
  - type: Quickstart
    url: https://developer.xpansiv.com/developer-portal/optimal-outcomes/quickstart
  - type: Overlay
    url: overlays/xpansiv-optimal-transfer-position-overlay.yaml
- aid: xpansiv-apx-power-markets
  name: APX Power Markets File Registry API
  description: The APX MarketSuite file registry and reporting API used to submit and
    retrieve ISO scheduling files for CAISO, ERCOT, PJM, SPP, MISO, ISONE and NYISO,
    alongside the XML/XSD schedule schemas and REST report endpoints.
  humanURL: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api
  baseURL: https://pm-file-api.apx.com
  tags:
  - Energy
  - Power Markets
  - Scheduling
  properties:
  - type: OpenAPI
    url: openapi/xpansiv-apx-power-markets-file-registry-openapi.yml
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api
  - type: APIReference
    url: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api/apiendpoints
  - type: Authentication
    url: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api/authentication
  - type: Postman
    url: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api/postman
  - type: Overlay
    url: overlays/xpansiv-apx-power-markets-file-registry-overlay.yaml
- aid: xpansiv-marketplace-fix
  name: Xpansiv Marketplace FIX API
  description: The Xpansiv Marketplace Server API for retrieving real-time market
    data and executing and managing orders on CBL, published as rules of engagement
    against the FIX 4.4 specification from the FIX Trading Community, with
    Transaction, DropCopy and MarketData session types.
  humanURL: https://developer.xpansiv.com/developer-portal/marketplace
  baseURL: https://developer.xpansiv.com/developer-portal/marketplace/fix-api
  tags:
  - Trading
  - Market Data
  - FIX Protocol
  properties:
  - type: Documentation
    url: https://developer.xpansiv.com/developer-portal/marketplace
  - type: APIReference
    url: https://developer.xpansiv.com/developer-portal/marketplace/fix-api
x-enrichment:
  date: '2026-09-04'
  status: enriched
  artifacts_added: 41
  pass: local-v3
common:
- type: Website
  url: https://www.xpansiv.com/
- type: DeveloperPortal
  url: https://developer.xpansiv.com/
- type: Documentation
  url: https://developer.xpansiv.com/developer-portal
- type: APIReference
  url: https://developer.xpansiv.com/developer-portal
- type: GettingStarted
  url: https://developer.xpansiv.com/developer-portal/xpansiv-connect/getting-started
- type: Support
  url: https://support.xpansiv.com/
- type: SignUp
  url: https://connect.xpansiv.com/app/login/
- type: Blog
  url: https://www.xpansiv.com/blog
- type: TermsOfService
  url: https://www.xpansiv.com/general-terms-of-use
- type: PrivacyPolicy
  url: https://www.xpansiv.com/privacy-policy
- type: Postman
  url: https://developer.xpansiv.com/developer-portal/xpansiv-power/rest_api/postman
- type: LLMsTxt
  url: llms/xpansiv-llms.txt
- type: MCPServer
  url: mcp/xpansiv-mcp.yml
- type: ToolCrosswalk
  url: mcp/xpansiv-tool-crosswalk.yml
- type: WellKnown
  url: well-known/xpansiv-well-known.yml
- type: Packages
  url: packages/xpansiv-packages.yml
- type: SDKs
  url: packages/xpansiv-packages.yml
- type: Authentication
  url: authentication/xpansiv-authentication.yml
- type: OAuthScopes
  url: scopes/xpansiv-scopes.yml
- type: Conventions
  url: conventions/xpansiv-conventions.yml
- type: ErrorCatalog
  url: errors/xpansiv-problem-types.yml
- type: Lifecycle
  url: lifecycle/xpansiv-lifecycle.yml
- type: Conformance
  url: conformance/xpansiv-conformance.yml
- type: DataModel
  url: data-model/xpansiv-data-model.yml
- type: DomainSecurity
  url: security/xpansiv-domain-security.yml
- type: RateLimits
  url: rate-limits/xpansiv-rate-limits.yml
- type: Plans
  url: plans/xpansiv-plans-pricing.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Sandbox
  url: sandbox/xpansiv-sandbox.yml
- type: Overlay
  url: overlays/xpansiv-connect-overlay.yaml