Store one proposal on Urban Game Theory (paid, per submission)
Store one proposal on Urban Game Theory (paid, per submission).
Answeringour last check, 2026-09-24
1 of 1checks answered this week
320 msmedian answer time
n/alisted price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.urbangametheory.xyz/agent/proposals
| Category | Commerce and shopping |
|---|---|
| Provider host | api.urbangametheory.xyz |
| Networks | solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 8 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | 320 ms |
Example input (from the provider)
{
"body": {
"agent": {
"controller": "algorithm",
"persona": "densifier-01",
"rationale": "The lot is underused and close to public transport.",
"run_id": "2026-09-20-densifier-01"
},
"cadastreParcelIds": [
"HR-335550-1234/1"
],
"city": "zagreb",
"description": "Six-storey residential infill matching the neighbouring eaves.",
"name": "Agent-proposed infill",
"offer": 1.5,
"offerCurrency": "USDC",
"type": "parcel"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": true,
"properties": {
"agent": {
"description": "Free-form provenance kept on the record; wallet and paid are overwritten by the server.",
"properties": {
"controller": {
"enum": [
"algorithm",
"llm",
null
],
"type": [
"string",
"null"
]
},
"persona": {
"type": [
"string",
"null"
]
},
"rationale": {
"type": [
"string",
"null"
]
},
"run_id": {
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"author": {
"description": "Omit, or your paying wallet's base58 address.",
"maxLength": 255,
"type": "string"
},
"buildingProposal": {
"description": "A building massing in the app's stored shape; copy from GET /proposals?city=\u2026&limit=5.",
"type": "object"
},
"cadastreFrame": {
"additionalProperties": true,
"description": "When the ownership flow was measured.",
"properties": {
"capturedAt": {
"description": "ISO 8601 capture timestamp.",
"type": "string"
}
},
"required": [
"capturedAt"
],
"type": "object"
},
"cadastreParcelIds": {
"description": "The parcels the proposal is declared on (from POST /parcels/under).",
"items": {
"maxLength": 255,
"type": "string"
},
"minItems": 1,
"type": "array"
},
"city": {
"description": "City id, e.g. zagreb, split, belgrade, new_york.",
"maxLength": 100,
"type": "string"
},
"description": {
"type": "string"
},
"effectHash": {
"description": "Fingerprint of goal + footprint + ownershipFlow. Acceptances bind to this effect.",
"type": "string"
},
"facets": {
"additionalProperties": true,
"description": "Authored terms. For public formations use ownership: to-city.",
"properties": {
"ownership": {
"enum": [
"no-change",
"to-me",
"to-city",
"third-party",
"per-slice"
],
"type": "string"
}
},
"type": "object"
},
"geometry": {
"description": "Top-level GeoJSON geometry for the proposal footprint.",
"type": "object"
},
"goal": {
"description": "Semantic land-use goal. Formation goals include park, square, lake, station, road-track, single, buildings, and reparcellization. A park/square/lake/station/road-track forms public ground.",
"type": "string"
},
"name": {
"maxLength": 500,
"type": "string"
},
"offer": {
"description": "Amount offered to the parcel owners.",
"type": "number"
},
"offerCurrency": {
"maxLength": 10,
"type": "string"
},
"ownershipFlow": {
"description": "Publish-time effect stamp: area taken from each cadastral parcel and its destination. Public formations use destination: public.",
"items": {
"additionalProperties": false,
"properties": {
"cededM2": {
"minimum": 0,
"type": "number"
},
"destination": {
"enum": [
"public",
"proposer",
"mapping",
"undecided"
],
"type": "string"
},
"parcelId": {
"type": "string"
}
},
"required": [
"parcelId",
"cededM2",
"destination"
],
"type": "object"
},
"type": "array"
},
"proposalId": {
"description": "Unique operation id. Reuse it, together with the same x402 payment identifier and body, for safe retries.",
"maxLength": 255,
"type": "string"
},
"roadProposal": {
"description": "A road corridor in the app's stored shape.",
"type": "object"
},
"structureProposal": {
"additionalProperties": true,
"description": "A park/square/lake/station. Set kind and its GeoJSON Polygon or MultiPolygon geometry.",
"properties": {
"applied": {
"type": "boolean"
},
"geometry": {
"type": "object"