Zerion · OpenAPI Overlay 1.0.0

API Evangelist enhancements for Zerion API

2 actions 2 updates update extends openapi/zerion-openapi-original.yml
Derived by API Evangelist Built from the contracts Zerion publishes. Zerion did not publish this file.
View Overlay File View on GitHub Overlay Specification

What the actions change

x-apievangelist-providerx-apievangelist-enrichedx-apievangelist-authx-apievangelist-paginationx-apievangelist-error-formatx-apievangelist-webhooksx-apievangelist-alt-authx-agentic-access

Targets 1

$.info

OpenAPI Overlay

Raw ↑ 
overlay: 1.0.0
info:
  title: API Evangelist enhancements for Zerion API
  version: 1.0.0
extends: openapi/zerion-openapi-original.yml
actions:
- target: $.info
  update:
    x-apievangelist-provider: zerion
    x-apievangelist-enriched: '2026-07-21'
    x-apievangelist-auth: HTTP Basic (API key as username, empty password)
    x-apievangelist-pagination: cursor (page[size] max 100, follow links.next)
    x-apievangelist-error-format: JSON:API errors[] array (title, detail)
    x-apievangelist-webhooks: >-
      Transaction subscriptions push JSON:API callbacks signed RSA-SHA256
      (X-Signature / X-Timestamp / X-Certificate-URL); see
      asyncapi/zerion-transactions-webhooks.yml
    x-apievangelist-alt-auth:
    - x402 (USDC on Base/Solana, PAYMENT-SIGNATURE header)
    - MPP (USDC on Tempo, Authorization: Payment header)
- target: $.info
  update:
    x-agentic-access: agentic-access/zerion-agentic-access.yml
    x-data-model: data-model/zerion-data-model.yml
    x-conventions: conventions/zerion-conventions.yml

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/zerion-api-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.

GitHub Google LinkedIn

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