> ## Documentation Index > Fetch the complete documentation index at: https://docs.etherfuse.com/llms.txt > Use this file to discover all available pages before exploring further. # List stablebond costs > Returns current pricing data for all stablebonds, including the bond cost in USD, fiat, and per-provider exchange rate sources. Each bond entry includes a `sources` map showing the exchange rate and derived `bond_cost_in_usd` from each FX provider, enabling oracle safety checks. Public — no API key required. ## OpenAPI ````yaml /openapi.json get /lookup/bonds/cost openapi: 3.1.0 info: title: Etherfuse FX API description: Partner-facing ramp API for onramps, offramps, swaps, and KYC. license: name: Proprietary version: 1.0.0 servers: - url: https://api.sand.etherfuse.com description: Sandbox security: - ApiKeyAuth: [] tags: - name: Authentication description: >- Partner JWT authentication — exchange a JWT for an access token, or launch a user into the app. - name: Lookup description: >- Public reference data: exchange rates, stablebonds, bond costs, country codes. - name: Assets description: Rampable stablecoins and stablebonds available per blockchain. - name: Onboarding description: Hosted and programmatic customer onboarding. - name: Agreements description: Legal agreement acceptance during onboarding. - name: Bank Accounts description: Register and retrieve customer bank accounts. - name: Quotes description: Price quotes for onramps, offramps, and swaps. - name: Orders description: Create, track, and manage ramp orders. - name: Swaps description: Crypto-to-crypto swaps. - name: Sponsored description: Token approvals for sponsored (gasless) offramps. - name: Customers description: Customer (child-organization) records. - name: Wallets description: Register and manage customer wallets. - name: KYC description: Submit and check customer KYC status. - name: Webhooks description: Event notification subscriptions. - name: Organizations description: Organization identity, child orgs, and partner fees. paths: /lookup/bonds/cost: get: tags: - Lookup summary: List stablebond costs description: >- Returns current pricing data for all stablebonds, including the bond cost in USD, fiat, and per-provider exchange rate sources. Each bond entry includes a `sources` map showing the exchange rate and derived `bond_cost_in_usd` from each FX provider, enabling oracle safety checks. Public — no API key required. operationId: get_bond_prices parameters: - name: max_age in: query description: >- Maximum age of a source in seconds. Sources older than this are excluded. required: false schema: type: - integer - 'null' format: int64 minimum: 0 responses: '200': description: Pricing data keyed by bond mint address content: application/json: schema: type: object additionalProperties: $ref: '#/components/schemas/PaymentData' propertyNames: type: string example: CETES7CKqqKQizuSN6iWQwmTeFRjbJR6Vw2XRKfEDR8f: bond_cost_in_fiat: '1.153754' bond_cost_in_payment_token: '1.153754' bond_cost_in_usd: '0.064785' bond_symbol: CETES currency: MXN current_basis_points: 578 current_time: '2026-03-23T16:50:32.821673099+00:00' fiat_exchange_rate_with_usd: '17.80900' mint: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v sources: provider_1: bond_cost_in_usd: '0.064781' exchange_rate: '17.81' updated_at: 1711212632 provider_2: bond_cost_in_usd: '0.064854' exchange_rate: '17.79' updated_at: 1711212630 symbol: USDC '500': description: Bond prices not available security: - {} components: schemas: PaymentData: type: object description: |- Current pricing for a single stablebond: cost in USD/fiat plus the per-provider exchange-rate `sources` used to derive it. required: - bond_cost_in_payment_token - bond_cost_in_usd - fiat_exchange_rate_with_usd - bond_cost_in_fiat - current_basis_points - bond_symbol - currency - current_time - mint - symbol - sources properties: bond_cost_in_fiat: type: string description: Bond cost denominated in the settlement (fiat) currency. bond_cost_in_payment_token: type: string description: Deprecated — use `bond_cost_in_fiat`. bond_cost_in_usd: type: string description: Bond cost denominated in USD. bond_symbol: type: string description: Bond symbol (e.g. `CETES`). currency: type: string description: Settlement currency (ISO 4217, e.g. `MXN`). current_basis_points: type: integer format: int32 description: >- Current annualized rate of the bond, in basis points (e.g. `578` = 5.78%). current_time: type: string description: Timestamp the price was computed (RFC 3339). fiat_exchange_rate_with_usd: type: string description: FX rate between the settlement currency and USD. mint: type: string description: Payment-token mint address. sources: type: object description: >- Per-FX-provider exchange rate and derived USD cost, for oracle safety checks. additionalProperties: $ref: '#/components/schemas/BondCostSource' propertyNames: type: string symbol: type: string description: Payment-token symbol (e.g. `USDC`). example: bond_cost_in_fiat: '1.153754' bond_cost_in_payment_token: '1.153754' bond_cost_in_usd: '0.064785' bond_symbol: CETES currency: MXN current_basis_points: 578 current_time: '2026-03-23T16:50:32.821673099+00:00' fiat_exchange_rate_with_usd: '17.80900' mint: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v sources: provider_1: bond_cost_in_usd: '0.064781' exchange_rate: '17.81' updated_at: 1711212632 provider_2: bond_cost_in_usd: '0.064854' exchange_rate: '17.79' updated_at: 1711212630 symbol: USDC BondCostSource: type: object description: >- A single FX provider's exchange rate and the bond cost it implies. The `sources` map on a bond lets clients run oracle-safety checks across providers. required: - exchange_rate - bond_cost_in_usd - updated_at properties: bond_cost_in_usd: type: string description: Bond cost in USD derived from this provider's rate. exchange_rate: type: string description: Provider's USD↔currency exchange rate. updated_at: type: integer format: int64 description: Unix timestamp (seconds) of the provider's last update. minimum: 0 securitySchemes: ApiKeyAuth: type: apiKey in: header name: Authorization description: API key sent in the Authorization header. ````