Hevn · OpenAPI Overlay 1.0.0

API Evangelist enhancements for HEVN API

3 actions 3 updates update extends openapi/hevn-inc-openapi-original.json
Derived by API Evangelist Built from the contracts Hevn publishes. Hevn did not publish this file.
View Overlay File View on GitHub Overlay Specification

What the actions change

x-apievangelist-enrichedx-apievangelist-providerx-apievangelist-notesx-agentic-summary

Targets 2

$.info
$.servers

OpenAPI Overlay

Raw ↑
overlay: 1.0.0
info:
  title: API Evangelist enhancements for HEVN API
  version: 1.0.0
extends: openapi/hevn-inc-openapi-original.json
actions:
  - target: $.info
    update:
      x-apievangelist-enriched: '2026-07-19'
      x-apievangelist-provider: hevn-inc
      x-apievangelist-notes: >-
        HEVN is a YC S26 fintech providing USD business accounts and
        stablecoin (USDC on Base) money movement for non-US companies. The API
        is agent-first: a dedicated /api/v1/mcp/* surface plus a first-party
        MCP server (hevn mcp install) and CLI (hevn-cli).
  - target: $.info
    update:
      x-agentic-summary:
        auth: API key (hvn_) bearer or X-Api-Key header
        idempotency: Idempotency-Key header / idempotency_key query on transfers
        mcp_server: published (hevn mcp install / hevn mcp serve)
        money_movement_guard: user spend permissions
  - target: $.servers
    update:
      - url: https://api.hevn.finance
        description: Production

Work with this as data

Every overlay here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for openapi overlays

4 MCP tools reach this
  • find_overlaysBrowse and filter every overlay in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This overlay
curl "https://apis.io/api/v1/overlays/hevn-inc-openapi-overlay"
All openapi overlays
curl "https://apis.io/api/v1/overlays?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.