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Isochrone store version and assumptions

GET
/v1/isochrone/meta

The active store version and its assumptions.

The frontend reads this for attribution, for the v= cache key, and to learn which directions/modes actually exist rather than assuming.

Responses

Section titled “Responses”

200

Section titled “200”

Successful Response

IsochroneMetaResponse

GET /v1/isochrone/meta (routers.isochrone.get_isochrone_meta)

object
assumptions
required
IsochroneAssumptions

Routing assumptions echoed from the store. Keys are store-defined; the current set is listed but extra keys are allowed. (routers.isochrone._assumptions)

object
max_trip_duration_min
Any of:
integer
transit_departure
Any of:
string
transit_percentile
Any of:
integer
transit_window_min
Any of:
integer
key
additional properties
any
dest_set
Any of:
string
directions
required
Directions
Array<string>
max_minutes
required
Max Minutes
integer
modes
required
Modes
Array<string>
version
required
Version
string
Example
{
  "assumptions": {
    "max_trip_duration_min": 60,
    "transit_departure": "2026-07-15T08:00:00",
    "transit_percentile": 10,
    "transit_window_min": 60
  },
  "dest_set": "bb_pairs/all",
  "directions": [
    "to",
    "from"
  ],
  "max_minutes": 60,
  "modes": [
    "walk",
    "bike",
    "transit"
  ],
  "version": "rn1_tn34"
}

304

Section titled “304”

Not modified (If-None-Match matched the ETag); no body, no tokens charged

503

Section titled “503”

Backend temporarily unavailable (debit-unavailable, store-unavailable); may set Retry-After

Problem

RFC 9457 problem detail. Served as application/problem+json. Additional members appear for some problem types (e.g. errors). (core.problems.problem)

object
detail
Any of:
string
status
required
Status
integer
title
required
Title
string
type
required
Type

Problem type URI; the final path segment is the stable slug

string
key
additional properties
any