generated: '2026-08-04'
method: derived
status: candidate
source: openapi/niural-public-api-openapi.yml
description: Niural operates no hosted or remote MCP server. Searched docs.niural.com (full llms.txt page
  index), niural.com, the Niural GitHub org, npm and the public MCP registries — no result; mcp.niural.com
  does not resolve. This is a CANDIDATE tool surface derived mechanically from the 15 operations in the
  published Niural Public API OpenAPI. No MCP endpoint is implied to exist. Every tool inherits its real
  input contract from the parameters and requestBody of the operation it names.
server:
  name: niural
  transport: http
  url: null
auth:
  note: Every tool other than obtain_auth_token requires a bearer access token from POST /authenticate
    (client_id + client_secret), valid 3600 seconds.
tools:
- name: obtain_auth_token
  description: Exchange client credentials for a bearer access token and refresh token.
  source_operation: openapi/niural-public-api-openapi.yml#POST /authenticate
- name: create_contract
  description: Create a new pay-on-demand contract for a contractor.
  source_operation: openapi/niural-public-api-openapi.yml#POST /contracts
- name: list_contracts
  description: List contracts, filterable by contract type, contractor and status.
  source_operation: openapi/niural-public-api-openapi.yml#GET /contracts
- name: get_contract
  description: Get a single contract by contract id.
  source_operation: openapi/niural-public-api-openapi.yml#GET /contracts/{contract-id}
- name: sign_contract
  description: Sign a contract as the employer.
  source_operation: openapi/niural-public-api-openapi.yml#PATCH /contracts/{contract-id}/sign
- name: invite_contractor
  description: Invite a contractor to sign a contract.
  source_operation: openapi/niural-public-api-openapi.yml#PATCH /contracts/{contract-id}/invite-contractor
- name: create_invoice
  description: Create an invoice against a contract.
  source_operation: openapi/niural-public-api-openapi.yml#createInvoice
- name: list_invoices
  description: List invoices, filterable by contract and invoice status.
  source_operation: openapi/niural-public-api-openapi.yml#listInvoices
- name: get_invoice
  description: Get a single invoice by invoice id.
  source_operation: openapi/niural-public-api-openapi.yml#getInvoice
- name: list_payment_methods
  description: List available payment methods for the organisation.
  source_operation: openapi/niural-public-api-openapi.yml#GET /payment-methods
- name: estimate_transaction
  description: Calculate the estimated amount and fees for a transaction before initiating it.
  source_operation: openapi/niural-public-api-openapi.yml#POST /transaction-estimates
- name: initiate_transaction
  description: Initiate a new transaction paying one or more invoices.
  source_operation: openapi/niural-public-api-openapi.yml#POST /transactions
- name: list_transactions
  description: List transactions, filterable by transaction status.
  source_operation: openapi/niural-public-api-openapi.yml#GET /transactions
- name: get_transaction
  description: Get a single transaction by transaction id.
  source_operation: openapi/niural-public-api-openapi.yml#GET /transactions/{transaction-id}
- name: update_pay_by_hash_transaction
  description: Attach an on-chain payment hash and chain id to a pay-by-hash transaction.
  source_operation: openapi/niural-public-api-openapi.yml#PATCH /transactions/{transaction-id}
agent_safety_note: initiate_transaction moves real money and Niural publishes no idempotency-key mechanism,
  so a retried call is not deduplicated. Any agent binding must treat it as non-retryable and confirm
  via list_transactions. See agentic-access/niural-agentic-access.yml.
crosswalk_note: No mcp/niural-tool-crosswalk.yml is emitted. A crosswalk records divergence between a
  real MCP/GraphQL surface and the REST core; here the candidate tool list is derived 1:1 from the OpenAPI,
  so a crosswalk would carry no information.
deployment:
  mode: none
  verified: derived
  tools: 15
  checked: '2026-08-12'
  source: catalog MCP census