generated: '2026-09-03'
method: derived
source: openapi/southendonsea-southend-now-api-openapi.yml + https://southendonsea.city/data/reuse + live probes 2026-09-03
read_only: true
auth:
  style: none
  note: Public, unauthenticated — no keys, no OAuth, no signup.
idempotency:
  coverage: na
  note: >-
    Read-only API — all three operations are GETs (getSouthendNow, getSouthendNowHistoryIndex,
    downloadSouthendNowHistoryCsv). There is no mutating surface, so idempotency does not apply.
reversibility:
  status: na
  note: No write surface — nothing to reverse.
dry_run:
  status: na
  note: No write surface.
pagination:
  style: none
  note: Current snapshot is a single document; the archive is a date index plus a full-CSV download. No pagination parameters.
versioning:
  style: none
  note: No URL or header versioning; see lifecycle/southendonsea-lifecycle.yml.
error_envelope:
  format: json
  note: Plain HTTP statuses; only a 503 is declared. See errors/southendonsea-problem-types.yml.
rate_limit_signaling:
  headers: []
  note: No RateLimit/X-RateLimit/Retry-After headers observed on a live response; no limits documented. See rate-limits/southendonsea-rate-limits.yml.
caching:
  note: 'cache-control: public, s-maxage=1800, stale-while-revalidate=86400 observed; payload carries generatedAt and refreshIntervalSeconds (1800).'
cors:
  note: 'access-control-allow-origin: * observed — browser-callable.'
attribution:
  note: >-
    Payloads carry licenceNote and per-section sourceUrl; the docs require checking Met Office,
    UKHSA, Environment Agency, DEFRA UK-AIR and Open-Meteo terms before republishing underlying
    values. API structure and documentation are CC BY 4.0.