> ## Documentation Index > Fetch the complete documentation index at: https://docs.jenzy.com/llms.txt > Use this file to discover all available pages before exploring further. # Quote a conversion > Price a conversion between a fiat asset and a stablecoin, in either direction. Fiat to fiat and stablecoin to stablecoin are not supported and get `unsupported_pair` (422). You fix `from_amount`; `to_amount` is exactly what you will receive if you execute before `expires_at`. A quote reserves no balance and is not listed. No Idempotency-Key: quote as often as you like, up to 30 per minute. ## OpenAPI ````yaml /v2/openapi.json post /conversions/quotes openapi: 3.1.0 info: title: Jenzy Hermes Multi-asset API version: 2.0.0 description: >- Hold, convert and pay out across the assets enabled for your organization. Every amount is an exact decimal string beside an `asset` field. Authenticate with the same `jz_live_…` API key as `/v1`. servers: - url: https://api.jenzy.com/v2 description: Production security: [] paths: /conversions/quotes: post: summary: Quote a conversion description: >- Price a conversion between a fiat asset and a stablecoin, in either direction. Fiat to fiat and stablecoin to stablecoin are not supported and get `unsupported_pair` (422). You fix `from_amount`; `to_amount` is exactly what you will receive if you execute before `expires_at`. A quote reserves no balance and is not listed. No Idempotency-Key: quote as often as you like, up to 30 per minute. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ConversionQuoteCreate' responses: '201': description: The quote. `to_amount` is the promise. content: application/json: schema: $ref: '#/components/schemas/ConversionQuote' '400': description: Malformed body, or `from_amount` with more than 4 decimal places. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '401': description: Missing, malformed, or revoked API key. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '403': description: >- Organization suspended, request IP not on the allowlist, no multi-asset access yet (`onboarding_incomplete` / `access_suspended`), or `corridor_not_enabled`. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '422': description: >- `unsupported_pair` (the pair is not one fiat asset and one stablecoin: fiat to fiat, stablecoin to stablecoin, or the same asset), `amount_below_minimum` or `limit_exceeded`. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '429': description: '`rate_limited` — 30 quotes per minute; honor `Retry-After`.' content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '503': description: >- `rate_unavailable` — no rate for this pair right now, retry shortly. Also `service_incident` / `service_maintenance` when the `/v2` shutter is closed. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' security: - ApiKeyAuth: [] components: schemas: ConversionQuoteCreate: type: object properties: from_asset: type: string minLength: 1 description: >- The asset you pay. One of `from_asset` and `to_asset` must be a fiat asset and the other a stablecoin. Fiat to fiat, stablecoin to stablecoin, or the same asset on both sides gets `unsupported_pair` (422). example: KES to_asset: type: string minLength: 1 description: >- The asset you receive. One of `from_asset` and `to_asset` must be a fiat asset and the other a stablecoin. example: USDT from_amount: anyOf: - type: integer - type: string pattern: ^\d+(\.\d+)?$ description: >- Exactly how much of `from_asset` to convert, at most 4 decimal places. Conversions fix the amount in; `to_amount` is what you receive. example: '1000.00' required: - from_asset - to_asset - from_amount ConversionQuote: type: object properties: quote_id: type: string format: uuid description: Pass this to `POST /v2/conversions`. from_asset: type: string minLength: 1 description: >- An asset code as `GET /v2/assets` lists it — uppercase, never compound (`KES`, `USDT`; never `USDT-TRON`). Network and rail live on the payment object. example: KES to_asset: type: string minLength: 1 description: >- An asset code as `GET /v2/assets` lists it — uppercase, never compound (`KES`, `USDT`; never `USDT-TRON`). Network and rail live on the payment object. example: USDT from_amount: type: string description: What you will pay, in `from_asset`. example: '1000.00' to_amount: type: string description: >- What you will receive, in `to_asset`. This is the promise: a conversion delivers exactly this or fails whole. example: '7.68075' rate: type: string description: >- `from_asset` per one `to_asset`, rounded to 8 decimal places for display. Your economics are entirely in this rate; there is no separate fee. Recomputing `from_amount ÷ rate` may differ from `to_amount` by one minor unit — `to_amount` is what counts. example: '130.19561892' expires_at: type: string description: >- ISO 8601. Execute before this or request a new quote; an expired quote is `quote_expired`. example: '2026-09-09T10:00:25.000Z' required: - quote_id - from_asset - to_asset - from_amount - to_amount - rate - expires_at ErrorEnvelope: type: object properties: error: type: object properties: code: type: string enum: - validation_error - unauthorized - forbidden - not_found - conflict - rate_limited - internal_error - unknown_institution - invalid_mobile_number - invalid_account_number - mobile_number_institution_mismatch - service_unavailable - sandbox_only - insufficient_funds - rail_disabled - amount_limit_exceeded - org_limit_exceeded - service_incident - service_maintenance - onboarding_incomplete - access_suspended - corridor_not_enabled - unsupported_pair - invalid_wallet_address - rate_unavailable - quote_expired - quote_used - limit_exceeded - amount_below_minimum - unsupported_asset description: >- Stable identifier a client may branch on — never renamed or removed. message: type: string required: - code - message required: - error securitySchemes: ApiKeyAuth: type: http scheme: bearer description: 'Your Jenzy API key: `Authorization: Bearer jz_live_…`' ````