Prosper

Prosper Investor API

RESTful API for Prosper investors and third-party agents to view account information, search active loan listings, place orders to purchase Notes, and retrieve owned Notes, invested loans, and loan payments. OAuth 2.0 over SSL. Production and sandbox environments.

GitHub

Documentation

📖
Documentation
https://developers.prosper.com/docs/investor/
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/authentication/prosper-authentication.yml

Other Resources

🔗
Conventions
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/conventions/prosper-conventions.yml
🔗
Idempotency
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/conventions/prosper-conventions.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/errors/prosper-problem-types.yml
🔗
Lifecycle
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/lifecycle/prosper-lifecycle.yml
🔗
Deprecation
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/lifecycle/prosper-lifecycle.yml
🔗
Sandbox
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/sandbox/prosper-sandbox.yml
🔗
X-MCPServerCandidate
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/mcp/prosper-mcp.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/data-model/prosper-data-model.yml
🔗
Conformance
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/conformance/prosper-conformance.yml
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/prosper/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
name: Prosper Investor API
description: RESTful API for Prosper investors and third-party agents to view account information, search
  active loan listings, place orders to purchase Notes, and retrieve owned Notes, invested loans, and
  loan payments. OAuth 2.0 over SSL. Production and sandbox environments.
humanURL: https://developers.prosper.com/docs/investor/
baseURL: https://api.prosper.com/v1
tags:
- Lending
- Investing
- Notes
- Listings
- Order
tags_raw:
- Lending
- Investing
- Notes
- Listings
- Orders
properties:
- type: Documentation
  url: https://developers.prosper.com/docs/investor/
- type: Authentication
  url: authentication/prosper-authentication.yml
- type: Conventions
  url: conventions/prosper-conventions.yml
- type: Idempotency
  url: conventions/prosper-conventions.yml
- type: ErrorCatalog
  url: errors/prosper-problem-types.yml
- type: Lifecycle
  url: lifecycle/prosper-lifecycle.yml
- type: Deprecation
  url: lifecycle/prosper-lifecycle.yml
- type: Sandbox
  url: sandbox/prosper-sandbox.yml
- type: X-MCPServerCandidate
  url: mcp/prosper-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate
    — a tool list derived from the published API contracts, not an existing server. The scorer already
    read the manifest and reported mcp_server correctly; the MCPServer type was crediting the artifact-type
    surfaces with a server that does not exist.'
- type: DataModel
  url: data-model/prosper-data-model.yml
- type: Conformance
  url: conformance/prosper-conformance.yml