Capital.xyz

Capital.xyz (the company behind the former Party Round) is a startup banking and fundraising platform that helps founders raise, hold, spend, and send money in one place. Companies sign up to run fundraising rounds, receive a virtual Visa debit card once capital is raised, hold and move funds, and connect the account to fintech services such as Gusto. The product is built on embedded-finance rails (Unit, Plaid, Visa) and is a consumer/SMB-facing application; as of this enrichment pass Capital.xyz publishes no public developer program, API reference, OpenAPI, or docs portal. Added to the API Evangelist network as a portfolio company of a16z.

Capital.xyz is profiled on the APIs.io network. Tagged areas include Company, Fintech, Banking, Startups, and Fundraising.

🌐 Visit website 📡 Source on GitHub

6.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyFintechBankingStartupsFundraisingEmbedded FinanceVenture Capital

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 6.3/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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/capitalxyz: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: capitalxyz
name: Capital.xyz
description: Capital.xyz (the company behind the former Party Round) is a startup banking and fundraising platform that helps
  founders raise, hold, spend, and send money in one place. Companies sign up to run fundraising rounds, receive a virtual
  Visa debit card once capital is raised, hold and move funds, and connect the account to fintech services such as Gusto.
  The product is built on embedded-finance rails (Unit, Plaid, Visa) and is a consumer/SMB-facing application; as of this
  enrichment pass Capital.xyz publishes no public developer program, API reference, OpenAPI, or docs portal. Added to the
  API Evangelist network as a portfolio company of a16z.
url: https://raw.githubusercontent.com/api-evangelist/capitalxyz/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-no-public-api: true
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://capital.xyz/img/common/app_icon.png
tags:
- Company
- Fintech
- Banking
- Startups
- Fundraising
- Embedded Finance
- Venture Capital
apis: []
common:
- type: Website
  url: https://capital.xyz
- type: GitHubOrganization
  url: https://github.com/capitalxyz
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence