OpenSea Offer Endpoints API

Offer endpoints for building, creating, fulfilling, and querying offers

Operations 9

POST /api/v2/orders/{chain}/{protocol}/offers Create an item offer #
POST /api/v2/offers Create a criteria offer #
POST /api/v2/offers/fulfillment_data Fulfill an offer #
POST /api/v2/offers/build Build a criteria offer #
GET /api/v2/offers/collection/{slug} Get offers by collection #
GET /api/v2/offers/collection/{slug}/traits Get trait offers for a collection #
GET /api/v2/offers/collection/{slug}/nfts/{identifier} Get offers by NFT #
GET /api/v2/offers/collection/{slug}/nfts/{identifier}/best Get best offer by NFT #
GET /api/v2/offers/collection/{slug}/all Get all offers by collection #

Work with this as data

Every API 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 apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • 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 API
curl "https://apis.io/api/v1/apis/opensea-offer-endpoints-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

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.

OpenAPI Specification

opensea-offer-endpoints-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: OpenSea Offer Endpoints API
  description: The API for OpenSea
  contact:
    name: OpenSea
    url: https://www.opensea.io
    email: contact@opensea.io
  version: 2.0.0
servers:
- url: https://api.opensea.io
  description: Production server
security:
- ApiKeyAuth: []
tags:


# --- truncated at 32 KB (38 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/opensea/refs/heads/main/openapi/opensea-offer-endpoints-api-openapi.yml