> ## Documentation Index > Fetch the complete documentation index at: https://docs.laso.finance/llms.txt > Use this file to discover all available pages before exploring further. # Get the fee schedule > Returns the fee and limits of every paid product: the route, the `amount` range it accepts, the fee rate, and the minimum fee. Free, no auth or payment header, so you can budget before you have an account. Fees are added on top of `amount`. The total is `amount + max(amount × fee_rate, min_fee)`, rounded up to the cent. The international card's `fee_rate` is the rate in effect now, including any running fee promotion. For the exact total of one specific request, read the `amount` in that route's 402 challenge: requesting a paid route without a payment header returns the quote and charges nothing. ## OpenAPI ````yaml /api-reference/openapi.json get /get-pricing openapi: 3.1.0 info: title: Laso Finance x402 API version: 1.0.0 x-docs-revision: eb9650e41e48 x-docs-manifest: https://laso.finance/.well-known/docs-version.json contact: email: agents+support@laso.finance x-guidance: >- Laso Finance is a payment-gated (x402) API that lets an AI agent spend USDC on real-world financial products: prepaid cards (U.S. and international), gift cards, push-to-card transfers to USD/EUR/GBP debit cards, and Venmo/PayPal payouts. Payment: every paid route is an x402 v2 endpoint. Call it with no payment header to receive a 402 challenge listing the accepted networks, then replay with a signed USDC payment. Both Base (eip155:8453) and Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) are accepted on every paid route; the caller picks either chain. Identity: `GET /auth` is free and identity-only. Prove wallet ownership with a `SIGN-IN-WITH-X` (CAIP-122) header to receive a Firebase id_token, then send that token as a Bearer credential to the authenticated read routes (`get-card-data`, `get-account-balance`, `get-kyc-status`, etc.). Paid routes also return fresh auth credentials in their response, so a payment is never required just to obtain a token. Recommended flow: (1) `GET /auth` to establish identity, (2) call a paid route (e.g. `GET /get-card`) to purchase a product, paying USDC on Base or Solana, (3) poll the authenticated read routes with the returned Bearer token to fetch the resulting card/transfer details. Full machine-readable instructions live at https://laso.finance/SKILL.md. description: >- Payment-gated API for Laso Finance. All paywalled routes use the x402 protocol — the caller includes a USDC payment header on Base (eip155:8453) or Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) and the server verifies payment before processing. Free routes require no payment header. The same 402 also carries an MPP (Machine Payments Protocol) challenge in WWW-Authenticate; an MPP client pays with USDC on Base by replaying with `Authorization: Payment ...`, and routes, prices, and responses are identical. ## Getting started To set up a wallet for making x402 payments, choose a provider: - **Locus** (default): https://paywithlocus.com/SKILL.md - **Sponge**: https://wallet.paysponge.com/skill.md — automatic x402 service discovery - **Ampersend**: https://www.ampersend.ai/getting-started.md — self-custody on Base or Solana with dual-approval spending limits. Laso Finance is a default skill, so no manual endpoint registration is needed. ## How x402 works 1. Call a paywalled endpoint without a payment header → receive a `402 Payment Required` response containing payment details (price, recipient address, network). 2. Construct an x402 payment header using the details from the 402 response. 3. Replay the request with the payment header → the server verifies payment and processes the request. ## Authentication flow `GET /auth` is free: callers prove wallet ownership by sending a `SIGN-IN-WITH-X` header (CAIP-122 wallet signature). Paywalled routes (`/get-card`, `/order-gift-card`, `/get-push-to-card`, `/order-intl-card`) also return fresh auth credentials in their responses, so a payment is never required just to obtain a token. Most routes return auth credentials (`id_token`, `refresh_token`, `expires_in`). Use the `id_token` as a Bearer token to call authenticated Laso Finance endpoints like `/get-card-data`. When the `id_token` expires, use `POST /auth` with `grant_type: refresh_token` to get a new one. ## Important notes The `/get-card` USA prepaid card endpoint is U.S. only — issued in USD, usable at U.S.-based merchants only, and physical goods must ship to a U.S. address. For non-U.S. merchants or non-USD currencies, use `GET /order-intl-card` instead (international prepaid card, admin-fulfilled within 24 hours). All cards are intended for the caller's own use. ## Rate limits Every response carries the request budget so you can pace yourself without probing for a limit: | Header | Meaning | | --- | --- | | `RateLimit-Limit` | Requests permitted per window | | `RateLimit-Remaining` | Requests still available | | `RateLimit-Reset` | Seconds until the window rolls over | | `RateLimit-Policy` | The policy these numbers describe, as `limit;w=seconds` | The same values are repeated as `X-RateLimit-*` for clients that only parse that spelling. Most routes advertise the service-wide ceiling. `POST /signup` enforces its own per-IP budget on top of it and overwrites these headers with its own numbers. `POST /refresh-card-data` is limited per card rather than per caller, so its headers keep the service-wide values and the per-card budget is reported only on rejection. Every rejection is a `429` carrying `Retry-After` in seconds and a matching `retry_after_seconds` field in the body, computed from the limit that actually rejected the request. Wait that long and retry once. Do not retry in a tight loop. ## API versioning Every response carries the contract version in an `X-Laso-Api-Version` header, and `GET /version` returns the same value as `api_version` alongside the policy below in machine-readable form. It is distinct from `X-Laso-Docs-Version`, which tracks the prose and moves whenever the documentation changes. | Change | What happens to `api_version` | | --- | --- | | New route, new optional request field, new response field | Unchanged. Tolerate unknown response fields. | | Breaking change | Ships under a new `api_version`. | A route being retired is marked `deprecated` in this description and answers with a `Deprecation: true` response header, plus a `Link` header with `rel="successor-version"` pointing at its replacement. Once a removal date is set it is published in a `Sunset` header (RFC 9745 / RFC 8594). There is no blanket notice period: the `Sunset` date on each deprecated route is the commitment. For step-by-step instructions, read https://laso.finance/SKILL.md servers: - url: https://laso.finance description: Production security: [] paths: /get-pricing: get: summary: Get the fee schedule description: >- Returns the fee and limits of every paid product: the route, the `amount` range it accepts, the fee rate, and the minimum fee. Free, no auth or payment header, so you can budget before you have an account. Fees are added on top of `amount`. The total is `amount + max(amount × fee_rate, min_fee)`, rounded up to the cent. The international card's `fee_rate` is the rate in effect now, including any running fee promotion. For the exact total of one specific request, read the `amount` in that route's 402 challenge: requesting a paid route without a payment header returns the quote and charges nothing. operationId: getPricing responses: '200': description: Fee schedule content: application/json: schema: type: object properties: note: type: string description: How fees are applied. products: type: array items: type: object properties: product: type: string description: Product identifier. example: bank_payment route: type: string description: The paid route that sells this product. example: /send-bank-payment amount_currencies: type: - array - 'null' items: type: string description: >- Currencies the route's `amount` may be denominated in. `null` for gift cards, whose `amount` is in the product's own currency. min_amount: type: number description: Smallest `amount` the route accepts. max_amount: type: number description: Largest `amount` the route accepts. fee_rate: type: number description: >- Fee as a fraction of `amount` (0.0025 is 0.25%), added on top. example: 0.0025 min_fee: type: number description: >- Smallest fee charged, in the `amount` currency. The fee is `max(amount × fee_rate, min_fee)`. example: 1.5 note: type: - string - 'null' description: Product-specific pricing rules, when there are any. example: note: >- Fees are added on top of the amount you request: the recipient or card receives the full amount, and you pay amount plus fee. The 402 challenge of a paid route carries the exact total for that request. products: - product: usa_prepaid_card route: /get-card amount_currencies: - USD min_amount: 5 max_amount: 1000 fee_rate: 0 min_fee: 0 note: No fee. The price is the amount loaded on the card. - product: bank_payment route: /send-bank-payment amount_currencies: - USD min_amount: 10 max_amount: 50000 fee_rate: 0.0025 min_fee: 1.5 note: null security: [] ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.