generated: '2026-08-04'
method: searched
source: https://www.nseindia.com/static/trade/platform-services-neat-trading-system-protocols
versioning:
  scheme: uri-path + versioned protocol document
  current:
    rfq_web_api: /rest/v1/ (protocol document v1.1.10)
    cbrics_web_api: /rest/v1/ (protocol document v1.16)
    ofs_web_api: /api/ (protocol document v1.3.4)
    rfq_fix_interface: FIX 5.0 SP2 / FIXT.1.1 (protocol document v1.0.2)
    nnf_capital_market: Trimmed NNF v6.6
    nnf_futures_options: Trimmed NNF v9.50
    nnf_currency_derivatives: Trimmed NNF v6.3
    nnf_commodity_derivatives: Trimmed NNF v3.5
    mtbt: v6.9
    egr_nnf: Trimmed NNF v1.2
  docs: https://www.nseindia.com/static/trade/platform-services-neat-trading-system-protocols
  note: >-
    NSE keeps two or three prior versions of each protocol document live on the protocols page
    alongside the current one — that overlap is the de-facto migration window. The HTTP URI version
    has not moved off v1 even across a breaking path rename (see changelog).
deprecation:
  policy_url: null
  sunset_header: false
  note: >-
    NSE publishes no deprecation policy, no Sunset/Deprecation header support (RFC 8594) and no
    end-of-life dates for superseded protocol versions. Retirement of an older protocol version is
    announced through the Exchange circulars channel, not through the API.
change_communication:
  circulars: https://www.nseindia.com/resources/exchange-communication-circulars
  protocol_page_updated: '2026-08-03'
sla:
  url: null
  uptime_target: null
  note: >-
    No API SLA is published. NSE publishes trading-session timings, trading holidays and a live
    market-status endpoint instead of a service-level commitment for its interfaces.
status_page: null
status_signals:
  market_status_endpoint: https://www.nseindia.com/api/marketStatus
  market_status_http: 200
  note: >-
    This is a market-open/closed signal consumed by the NSE website, not an API/system status page.
    It is undocumented and behind the same Akamai bot manager that 403s the site root.
  trading_holidays: https://www.nseindia.com/resources/exchange-communication-holidays
deprecated_operations:
- api: NSE RFQ Web API
  operation: POST /v1/partisstype/all
  replaced_by: POST /v1/partisstyp/all
  version: 1.1.8
  date: '2025-04-23'
  note: Renamed in place with no versioned alias and no deprecation window documented.
x-evidence:
  fetched: '2026-08-04'
  probes:
  - {url: 'https://www.nseindia.com/static/trade/platform-services-neat-trading-system-protocols', http_status: 200}
  - {url: 'https://www.nseindia.com/api/marketStatus', http_status: 200}
  - {url: 'https://www.nseindia.com/resources/exchange-communication-circulars', http_status: 200}