FarmDash Agent Hub Swap API

openapi: 3.2.0
info:
  title: FarmDash Agent Swap API
  version: 2.0.0
  description: 'WARNING: Running trade executions and cancellations places real perpetual futures trades and alters active market exposure, carrying significant risk of financial loss. Immediate, explicit manual end-user confirmation and consent is strictly required immediately before placing any execution or cancellation request. Do not allow autonomous agents to auto-run trade execution or cancellation without manual user approval.


    FarmDash is an intelligence and control layer for DeFi agents and serious airdrop farmers. This API covers swap transaction preparation (Signal Architect),

    protocol discovery intelligence (Trail Heat), perpetual futures (Futures Strategist), portfolio

    research, bounded autonomous sessions, x402 payment flows, and agent-readable opportunity intelligence.


    FarmDash does not request seed phrases or raw wallet private keys. Compatibility

    swap routes do not custody funds; separately configured venue or MPC delegations

    remain subject to their provider controls and explicit policy bounds.


    ## Authentication

    | Tier | Price | Auth | Rate Limit | Best for |

    |------|-------|------|------------|----------|

    | Scout | Free | None | 5 req / 24 h per IP | Keyless discovery and quotes |

    | Pioneer | $39.99/mo USDC | `Authorization: Bearer <KEY>` | 1,500 req / day | Serious farmers, full datasets, sybil audits, wallet analytics |

    | Syndicate | $199/mo USDC | `Authorization: Bearer <KEY>` | 50,000 req / day | Teams, serious agents, high-volume API use, webhooks, unrestricted CORS, advanced control/session tooling |


    For SDK development without live data, use the deterministic sandbox on

    the two endpoints that explicitly support it (`/v1/agent/protocols` and

    `/v1/trail-heat`):

    `?mock=true`, `X-FarmDash-Mock: true`, or `Authorization: Bearer fd_sandbox_mock`

    Quote mock requests return typed `mock_not_supported` without contacting a live provider.


    Swap execution requires a fresh successful preflight simulation plus an EIP-191 agent wallet signature.

    Futures execution requires an EIP-712 Hyperliquid wallet signature.


    ## Dust Storm Protocol

    On upstream failure, FarmDash returns `ok:false` with a typed degraded state

    and a `warnings` array containing `{ kind: "dust_storm", message: "..." }`.

    Cached SDK responses may be returned as stale with explicit stale-data age.


    ## x402 Payment Wall

    When Scout limits are exceeded, send `X-Payment-Proof: 0x<txHash>` with a

    route-specific USDC transfer on Base to the treasury to unlock one additional request.

    The configured default overage is 0.01 USDC; premium routes return their own amount.


    ## Data Confidence

    Agent-facing research responses include `data_quality` and `scoring_methodology`

    where available. Trail Heat is a transparent heuristic, not a guaranteed yield,

    allocation, or airdrop outcome.


    ## Rate Limit Headers

    All responses include:

    - `X-RateLimit-Limit` — max requests for the current window

    - `X-RateLimit-Remaining` — remaining requests

    - `X-RateLimit-Reset` — UTC epoch seconds when the window resets

    - `X-Request-ID` — unique request trace ID (echo it for support)


    ## Versioned Signature Payload (v1)

    `v1:FARMDASH_SWAP:{fromChainId}:{toChainId}:{fromToken}:{toToken}:{fromAmount}:{agentAddress}:{toAddress}:{nonce}`


    ## Mandatory Swap Simulation Gate

    Call `/agents/quote` with `walletAddress` to receive `intent_id`, then call

    `POST /v1/simulate` with that intent and wallet before calling `/agents/swap`.

    `/agents/swap` rejects missing, failed, expired, or mismatched simulations.

    '
  contact:
    name: FarmDash Engineering
    url: https://www.farmdash.one/agents
  license:
    name: MIT
servers:
- url: https://www.farmdash.one/api
  description: Production
tags:
- name: Swap
  description: Token swap quotes, execution, and confirmation
paths:
  /agents/quote:
    get:
      operationId: getSwapQuote
      summary: Get a token swap quote
      description: 'Returns an unsigned preview quote showing expected output, fee breakdown,

        protocol selection, and FarmDash execution guardrails. No authentication required.

        When wallet and risk inputs are supplied, the response also includes

        allowance checks, depeg/health warnings, quote-decay diagnostics, and

        positive-net-edge guidance.

        Include `walletAddress` to receive a wallet-bound `intent_id` for the

        mandatory `/v1/simulate` preflight.

        Compatible live providers are compared by route, output, gas, and risk.

        Callers may force Li.Fi, 0x, or x402; automatic selection may also choose OKX.

        `mock=true` is not supported and returns a typed 400 without contacting a provider.

        '
      tags:
      - Swap
      parameters:
      - $ref: '#/components/parameters/FromChainId'
      - $ref: '#/components/parameters/ToChainId'
      - $ref: '#/components/parameters/FromToken'
      - $ref: '#/components/parameters/ToToken'
      - $ref: '#/components/parameters/FromAmount'
      - name: protocol
        in: query
        schema:
          type: string
          enum:
          - lifi
          - zerox
          - x402
        description: Force a specific routing protocol (auto-selected if omitted)
      - name: mock
        in: query
        schema:
          type: string
          enum:
          - 'true'
        description: Unsupported for quotes. Returns HTTP 400 mock_not_supported and never contacts a live quote provider.
      - name: walletAddress
        in: query
        schema:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        description: Optional wallet used for approval and allowance checks
      - name: toAddress
        in: query
        schema:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        description: Optional destination wallet override for previewing the signed route
      - name: slippage
        in: query
        schema:
          type: number
          minimum: 0.01
          maximum: 5
        description: Optional slippage tolerance in percent
      - name: expectedUpsideUsd
        in: query
        schema:
          type: number
        description: Optional upside estimate used to enforce positive net edge
      - name: riskBufferUsd
        in: query
        schema:
          type: number
        description: Optional execution-risk haircut added to total route cost
      - name: healthFactor
        in: query
        schema:
          type: number
        description: Optional health factor used for halt checks
      - name: liquidationBufferPct
        in: query
        schema:
          type: number
        description: Optional liquidation buffer percentage used for halt checks
      - name: safetyMode
        in: query
        schema:
          $ref: '#/components/schemas/SwapSafetyMode'
        description: '`strict` halts on severe quote decay, `balanced` downgrades that condition to a warning'
      responses:
        '200':
          description: Swap quote
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
            X-Request-ID:
              $ref: '#/components/headers/X-Request-ID'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/QuoteResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '429':
          $ref: '#/components/responses/RateLimitExceeded'
        '502':
          description: Typed live quote provider degradation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /v1/simulate:
    post:
      operationId: simulateSwapExecution
      summary: Simulate a wallet-bound swap intent
      description: 'Mandatory pre-execution simulation gate for Signal Architect. The caller

        submits the `intent_id` returned by `/agents/quote` plus the signing wallet.

        FarmDash simulates the quote intent, caches the result for 60 seconds, and

        returns a `simulation_id` that `/agents/swap` requires.

        '
      tags:
      - Swap
      security:
      - bearerAuth: []
      - {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SwapSimulationRequest'
      responses:
        '200':
          description: Simulation report
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapSimulationResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '409':
          description: Intent and wallet mismatch
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          $ref: '#/components/responses/RateLimitExceeded'
  /agents/swap:
    post:
      operationId: executeSwap
      summary: Execute a signed token swap
      description: 'Main swap router. Requires a fresh successful `simulationId`, authenticates

        the agent via EIP-191 signature, reuses the simulated quote intent, applies

        Execution Alpha route selection, and enforces Risk Sentinel guardrails before

        returning ready-to-broadcast transaction calldata.


        FarmDash NEVER touches funds. The protocol (Li.Fi / 0x / x402)

        executes the swap. Treasury receives the fee haircut directly.


        **Fee schedule**: 45 bps default, ≥$10k → 35 bps, ≥$100k → 25 bps.

        '
      tags:
      - Swap
      security:
      - bearerAuth: []
      - {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SwapRequest'
      responses:
        '200':
          description: Executable swap with transaction calldata
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
            X-Request-ID:
              $ref: '#/components/headers/X-Request-ID'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapResult'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          description: Invalid signature or expired nonce
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '409':
          description: Swap halted by Risk Sentinel guardrails
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapHaltResponse'
        '428':
          description: Missing, expired, failed, or mismatched preflight simulation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '429':
          $ref: '#/components/responses/RateLimitExceeded'
  /agents/confirm:
    post:
      operationId: confirmSwap
      summary: Confirm swap execution with on-chain tx hash
      description: 'After broadcasting the swap transaction, confirm it here with the tx hash.

        FarmDash verifies the transaction on-chain (10s timeout with LRU cache)

        and marks the fee event as settled. Idempotent — safe to retry.

        '
      tags:
      - Swap
      security:
      - bearerAuth: []
      - {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConfirmRequest'
      responses:
        '200':
          description: Confirmation result
          headers:
            X-Request-ID:
              $ref: '#/components/headers/X-Request-ID'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConfirmResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
components:
  schemas:
    SwapHaltResponse:
      type: object
      properties:
        error:
          type: string
          example: swap_halted
        code:
          type: string
          example: swap_halted
        selectedProtocol:
          $ref: '#/components/schemas/SupportedProtocol'
        executionAlpha:
          $ref: '#/components/schemas/ExecutionAlphaReport'
        riskReport:
          $ref: '#/components/schemas/SwapRiskReport'
    RiskSeverity:
      type: string
      enum:
      - low
      - medium
      - high
      - critical
    QuoteResponse:
      type: object
      required:
      - protocol
      - estimatedOutput
      - feeBps
      - feeAmountUSD
      - gasEstimate
      - txData
      - expiresAt
      properties:
        protocol:
          $ref: '#/components/schemas/SupportedProtocol'
        estimatedOutput:
          type: string
          description: Expected output in wei
        feeBps:
          type: integer
          description: Fee in basis points (45 = 0.45% default; configured volume discounts may apply)
        mode:
          type: string
          const: live
        unsigned:
          type: boolean
          const: true
        broadcast_by_farmdash:
          type: boolean
          const: false
        feeAmountUSD:
          type: string
        gasEstimate:
          type: string
        txData:
          $ref: '#/components/schemas/SwapTxData'
        expiresAt:
          type: integer
          description: Unix timestamp — quotes valid 30s
        simulation_required:
          type: boolean
          description: True when execute_swap requires a simulation for this route
        simulation_available:
          type: boolean
          description: True when the quote was wallet-bound and returned an intent_id
        intent_id:
          type: string
          nullable: true
          description: Pass this to POST /v1/simulate before execution
        intent_expires_at:
          type: string
          nullable: true
          format: date-time
        simulate_url:
          type: string
          example: /api/v1/simulate
        allowanceTarget:
          type: string
          nullable: true
        gasEstimateUsd:
          type: number
          nullable: true
        bridgeFeeUsd:
          type: number
          nullable: true
        executionAlpha:
          $ref: '#/components/schemas/ExecutionAlphaReport'
        riskReport:
          $ref: '#/components/schemas/SwapRiskReport'
        note:
          type: string
    RiskFlag:
      type: object
      required:
      - code
      - category
      - severity
      - title
      - message
      properties:
        code:
          type: string
        category:
          type: string
          enum:
          - approval
          - bridge
          - contract
          - token
          - health
          - execution
        severity:
          $ref: '#/components/schemas/RiskSeverity'
        title:
          type: string
        message:
          type: string
        metadata:
          type: object
          additionalProperties: true
    SwapTxData:
      type: object
      required:
      - to
      - data
      - value
      - chainId
      properties:
        to:
          type: string
          description: Protocol contract address (NOT FarmDash)
        data:
          type: string
          description: Encoded calldata
        value:
          type: string
          description: Native token value in wei
        chainId:
          type: integer
    SwapSimulationRequest:
      type: object
      required:
      - intent_id
      - wallet_address
      properties:
        intent_id:
          type: string
          description: Wallet-bound quote intent returned by /agents/quote
          example: fd_intent_7f3a
        wallet_address:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          description: Signing wallet for the simulated execution
    ConfirmRequest:
      type: object
      required:
      - feeEventId
      - txHash
      - agentAddress
      properties:
        feeEventId:
          type: string
          format: uuid
        txHash:
          type: string
          pattern: ^0x[a-fA-F0-9]{64}$
        agentAddress:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
    ConfirmResponse:
      type: object
      properties:
        ok:
          type: boolean
        feeEventId:
          type: string
          format: uuid
        settlementStatus:
          type: string
          enum:
          - confirmed
          - pending
          - expired
        idempotent:
          type: boolean
          description: True if this was a duplicate confirmation (safe to retry)
    RouteCandidate:
      type: object
      properties:
        protocol:
          $ref: '#/components/schemas/SupportedProtocol'
        estimatedOutput:
          type: string
        feeAmountUsd:
          type: number
        gasEstimateUsd:
          type: number
          nullable: true
        bridgeFeeUsd:
          type: number
          nullable: true
        routeRiskScore:
          type: number
        selected:
          type: boolean
    PegCheck:
      type: object
      properties:
        tokenAddress:
          type: string
        symbol:
          type: string
        reference:
          type: string
          enum:
          - USD
          - ETH
        priceUsd:
          type: number
          nullable: true
        referencePriceUsd:
          type: number
          nullable: true
        deviationPct:
          type: number
          nullable: true
        alert:
          type: boolean
    NetEdgeAnalysis:
      type: object
      properties:
        expectedUpsideUsd:
          type: number
          nullable: true
        protocolFeeUsd:
          type: number
        gasUsd:
          type: number
        bridgeFeeUsd:
          type: number
        riskBufferUsd:
          type: number
        totalCostUsd:
          type: number
        netEdgeUsd:
          type: number
          nullable: true
        positive:
          type: boolean
          nullable: true
        enforced:
          type: boolean
    SwapRequest:
      type: object
      required:
      - fromChainId
      - toChainId
      - fromToken
      - toToken
      - fromAmount
      - agentAddress
      - toAddress
      - simulationId
      - nonce
      - signature
      properties:
        fromChainId:
          type: integer
          enum:
          - 1
          - 10
          - 137
          - 8453
          - 42161
          - 59144
        toChainId:
          type: integer
          enum:
          - 1
          - 10
          - 137
          - 8453
          - 42161
          - 59144
        fromToken:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        toToken:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        fromAmount:
          type: string
          pattern: ^\d+$
          description: Amount in wei
        agentAddress:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          description: Agent wallet address (signer)
        toAddress:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          description: Destination wallet for swapped tokens
        slippage:
          type: number
          minimum: 0.01
          maximum: 5
          default: 0.5
          description: Slippage tolerance in percent (capped at 5%)
        protocol:
          type: string
          enum:
          - lifi
          - zerox
          - x402
        volumeHintUSD:
          type: number
          description: USD volume estimate - unlocks fee discounts (>= $10k -> 35bps, >= $100k -> 25bps)
        expectedUpsideUsd:
          type: number
          description: Optional upside estimate in USD for positive-net-edge checks
        riskBufferUsd:
          type: number
          description: Optional extra execution-risk buffer in USD
        healthFactor:
          type: number
          description: Optional lending health factor supplied by the caller
        liquidationBufferPct:
          type: number
          description: Optional liquidation-buffer percentage supplied by the caller
        walletAddress:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          description: Optional wallet address used for on-chain approval checks
        safetyMode:
          $ref: '#/components/schemas/SwapSafetyMode'
          description: USD volume estimate — unlocks fee discounts (≥$10k → 35bps, ≥$100k → 25bps)
        simulationId:
          type: string
          description: Fresh successful simulation_id from POST /v1/simulate
        intentId:
          type: string
          description: Optional quote intent ID; must match the simulation when supplied
        nonce:
          type: string
          description: Current timestamp in milliseconds (60s window)
        signature:
          type: string
          pattern: ^0x[a-fA-F0-9]{130}$
          description: EIP-191 personal_sign of the v1 versioned payload
    SwapResult:
      type: object
      required:
      - protocol
      - estimatedOutput
      - feeBps
      - feeAmountUSD
      - gasEstimate
      - txData
      - expiresAt
      properties:
        protocol:
          $ref: '#/components/schemas/SupportedProtocol'
        estimatedOutput:
          type: string
        feeBps:
          type: integer
        feeAmountUSD:
          type: string
        feeEventId:
          type: string
          format: uuid
          description: Use with /agents/confirm to confirm settlement
        gasEstimate:
          type: string
        txData:
          $ref: '#/components/schemas/SwapTxData'
        expiresAt:
          type: integer
        allowanceTarget:
          type: string
          nullable: true
        gasEstimateUsd:
          type: number
          nullable: true
        bridgeFeeUsd:
          type: number
          nullable: true
        simulation:
          type: object
          additionalProperties: true
        executionAlpha:
          $ref: '#/components/schemas/ExecutionAlphaReport'
        riskReport:
          $ref: '#/components/schemas/SwapRiskReport'
        confirmUrl:
          type: string
          example: /api/agents/confirm
    QuoteDecayMetrics:
      type: object
      properties:
        previousObservedAt:
          type: integer
          nullable: true
        quoteAgeMs:
          type: integer
          nullable: true
        outputDecayBps:
          type: number
        gasIncreaseBps:
          type: number
        severity:
          $ref: '#/components/schemas/QuoteDecaySeverity'
    SupportedProtocol:
      type: string
      enum:
      - lifi
      - zerox
      - x402
      - okx
    QuoteDecaySeverity:
      type: string
      enum:
      - none
      - low
      - medium
      - high
    ExecutionAlphaReport:
      type: object
      properties:
        selectedProtocol:
          $ref: '#/components/schemas/SupportedProtocol'
        routeReason:
          type: string
        mevProtection:
          type: object
          properties:
            safetyMode:
              $ref: '#/components/schemas/SwapSafetyMode'
            actualSlippageBps:
              type: integer
            maxRecommendedSlippageBps:
              type: integer
        candidates:
          type: array
          items:
            $ref: '#/components/schemas/RouteCandidate'
        quoteDecay:
          $ref: '#/components/schemas/QuoteDecayMetrics'
        netEdge:
          $ref: '#/components/schemas/NetEdgeAnalysis'
    HealthCheck:
      type: object
      properties:
        healthFactor:
          type: number
          nullable: true
        liquidationBufferPct:
          type: number
          nullable: true
        alertLevel:
          type: string
          enum:
          - none
          - warning
          - critical
        shouldHalt:
          type: boolean
    PaymentRequiredError:
      type: object
      properties:
        ok:
          type: boolean
          example: false
        error:
          type: string
          example: payment_required
        code:
          type: string
          example: payment_required
        message:
          type: string
        retryable:
          type: boolean
        direct_upgrade_url:
          type: string
          format: uri
        rate_limit:
          type: object
          additionalProperties: true
        developer_sandbox:
          type: object
          additionalProperties: true
        payment_required:
          type: object
          properties:
            amount:
              type: string
              example: 0.01 USDC
            chain:
              type: string
              example: Base
            destination:
              type: string
              example: '0xb0Ed0d7bca24BBaD635B977C2efbE06742e33377'
            token:
              type: string
            chainId:
              type: integer
              example: 8453
    ErrorResponse:
      type: object
      required:
      - error
      properties:
        ok:
          type: boolean
          example: false
        error:
          type: string
        code:
          type: string
        message:
          type: string
        retryable:
          type: boolean
        request_id:
          type: string
        details:
          type: object
          additionalProperties: true
    SwapSafetyMode:
      type: string
      enum:
      - strict
      - balanced
    SwapSimulationResponse:
      type: object
      required:
      - ok
      - simulation_id
      - intent_id
      - success
      - gas_used
      - gas_cost_usd
      - output_amount
      - mev_risk
      - valid_until
      - wallet_address
      - selected_protocol
      - required_for_execution
      properties:
        ok:
          type: boolean
          example: true
        simulation_id:
          type: string
          example: sim_9b2e
        intent_id:
          type: string
        success:
          type: boolean
        gas_used:
          type: number
        gas_cost_usd:
          type: number
        output_amount:
          type: string
        price_impact_pct:
          type: number
          nullable: true
        mev_risk:
          type: string
          enum:
          - low
          - medium
          - high
        revert_reason:
          type: string
          nullable: true
        valid_until:
          type: string
          format: date-time
        wallet_address:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        selected_protocol:
          $ref: '#/components/schemas/SupportedProtocol'
        tx_fingerprint:
          type: string
        request_fingerprint:
          type: string
        provider:
          type: string
        cached:
          type: boolean
        required_for_execution:
          type: boolean
          const: true
    SwapRiskReport:
      type: object
      properties:
        flags:
          type: array
          items:
            $ref: '#/components/schemas/RiskFlag'
        approval:
          allOf:
          - $ref: '#/components/schemas/AllowanceStatus'
          nullable: true
        pegChecks:
          type: array
          items:
            $ref: '#/components/schemas/PegCheck'
        health:
          allOf:
          - $ref: '#/components/schemas/HealthCheck'
          nullable: true
        shouldHalt:
          type: boolean
        haltReasons:
          type: array
          items:
            type: string
    AllowanceStatus:
      type: object
      properties:
        spender:
          type: string
          nullable: true
        allowance:
          type: string
          nullable: true
        requiredAmount:
          type: string
        approvalNeeded:
          type: boolean
        overApproved:
          type: boolean
        source:
          type: string
          enum:
          - onchain
          - quote_fallback
          - unavailable
  responses:
    BadRequest:
      description: Invalid parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    RateLimitExceeded:
      description: Rate limit exceeded
      headers:
        Retry-After:
          schema:
            type: integer
          description: Seconds until rate limit resets
        X-RateLimit-Limit:
          $ref: '#/components/headers/X-RateLimit-Limit'
        X-RateLimit-Remaining:
          $ref: '#/components/headers/X-RateLimit-Remaining'
        X-RateLimit-Reset:
          $ref: '#/components/headers/X-RateLimit-Reset'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    PaymentRequired:
      description: Free-tier limit exceeded — x402 payment required
      headers:
        X-Payment-Required:
          schema:
            type: string
        X-Payment-Address:
          schema:
            type: string
          description: Treasury wallet (USDC on Base)
        X-Payment-Token:
          schema:
            type: string
          description: USDC contract on Base
        X-Payment-Amount:
          schema:
            type: string
          description: Amount in token decimals (990000 = 0.99 USDC)
        X-Payment-Chain-Id:
          schema:
            type: string
          description: 8453 (Base)
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/PaymentRequiredError'
  parameters:
    FromToken:
      name: fromToken
      in: query
      required: true
      schema:
        type: string
        pattern: ^0x[a-fA-F0-9]{40}$
      description: Source token contract address
    FromAmount:
      name: fromAmount
      in: query
      required: true
      schema:
        type: string
        pattern: ^\d+$
      description: Amount in wei (no leading zeros)
    ToChainId:
      name: toChainId
      in: query
      required: true
      schema:
        type: integer
        enum:
        - 1
        - 10
        - 137
        - 8453
        - 42161
        - 59144
      description: Destination chain ID
    ToToken:
      name: toToken
      in: query
      required: true
      schema:
        type: string
        pattern: ^0x[a-fA-F0-9]{40}$
      description: Destination token contract address
    FromChainId:
      name: fromChainId
      in: query
      required: true
      schema:
        type: integer
        enum:
        - 1
        - 10
        - 137
        - 8453
        - 42161
        - 59144
      description: 'Source chain: 1=Ethereum, 10=Optimism, 137=Polygon, 8453=Base, 42161=Arbitrum, 59144=Linea'
  headers:
    X-RateLimit-Reset:
      description: UTC epoch seconds when the rate limit window resets
      schema:
        type: string
    X-Request-ID:
      description: Unique request trace ID for debugging and support
      schema:
        type: string
        format: uuid
    X-RateLimit-Limit:
      description: Maximum requests allowed in the current window
      schema:
        type: string
    X-RateLimit-Remaining:
      description: Remaining requests in the current window
      schema:
        type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Pioneer or Syndicate API key
x-agent-use-cases:
- id: bounded-autopilot
  name: Bounded Autopilot
  tier: Syndicate
  cadence: Every 5 minutes
  purpose: Run an always-on loop inside explicit budgets, allowlists, cooldowns, quote freshness, and local-signing requirements.
  primaryTools:
  - agent_onboard
  - create_session
  - configure_autopilot
  - autopilot_cycle
  - session_heartb

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# Full source: https://raw.githubusercontent.com/api-evangelist/farmdash/refs/heads/main/openapi/farmdash-swap-api-openapi.yml