> ## Documentation Index
> Fetch the complete documentation index at: https://docs.range.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Reverse lookup: which multisigs does this address sign on

> Given a signer address, returns the Safe multisigs it co-signs, across every EVM chain Range's Safe integration supports (or a single `network` if given). Squads/Altitude/Realms are not covered yet: their membership lists live inside variable-length on-chain state with no cheap reverse index, unlike Safe's own owners API.



## OpenAPI

````yaml /api-reference/data-api.json get /v2/multisig/memberships
openapi: 3.0.0
info:
  title: Range Data API
  description: >-
    The Range Data API for crypto addresses, networks, transactions, and
    entities.
  version: 1.7.20
  contact: {}
servers:
  - url: https://api.range.org
    description: Range API Server
security:
  - Authorization: []
tags:
  - name: Entity Information
    description: Get information about entities.
  - name: Network Information
    description: Get information about networks.
  - name: Protocols
    description: Get information about cross-chain protocols.
  - name: Token transfers
    description: Get information about token transfers.
paths:
  /v2/multisig/memberships:
    get:
      tags:
        - Multisig
      summary: 'Reverse lookup: which multisigs does this address sign on'
      description: >-
        Given a signer address, returns the Safe multisigs it co-signs, across
        every EVM chain Range's Safe integration supports (or a single `network`
        if given). Squads/Altitude/Realms are not covered yet: their membership
        lists live inside variable-length on-chain state with no cheap reverse
        index, unlike Safe's own owners API.
      operationId: getMemberships
      parameters:
        - name: address
          required: true
          in: query
          description: Signer address to reverse-look-up multisig memberships for.
          schema:
            example: '0x4d1941745e00808b1B5aA361c22feb4747e4E30'
            type: string
        - name: network
          required: false
          in: query
          description: >-
            Restrict the reverse lookup to a single EVM chain. Omit to check
            every chain the Safe integration supports.
          schema:
            type: string
            example: ethereum
            enum:
              - ethereum
              - arbitrum
              - base
              - optimism
              - polygon
              - bnb
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MultisigMembershipsResponseDto'
components:
  schemas:
    MultisigMembershipsResponseDto:
      type: object
      properties:
        items:
          type: array
          items:
            $ref: '#/components/schemas/MultisigMembershipDto'
      required:
        - items
    MultisigMembershipDto:
      type: object
      properties:
        address:
          type: string
          description: Checksummed Safe address.
          example: '0xfF501B324DC6d78dC9F983f140B9211c3EdB4dc7'
        network:
          type: string
          example: ethereum
        provider:
          type: string
          description: >-
            Only `safe` is populated today — Squads/Altitude/Realms have no
            cheap reverse index and are not covered by this endpoint yet.
          enum:
            - safe
          example: safe
        threshold:
          type: number
          example: 2
        member_count:
          type: number
          example: 5
      required:
        - address
        - network
        - provider
        - threshold
        - member_count
  securitySchemes:
    Authorization:
      type: apiKey
      in: header
      name: X-API-KEY
      description: Authorization method required to allow user to access the api endpoints.

````