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API Endpoints

Complete reference for all Routstr API endpoints.

Overview

Routstr provides OpenAI-compatible endpoints with Bitcoin/eCash payment integration.

Base URL

All endpoints use the base URL:

https://api.routstr.com/v1

Authentication

All endpoints require authentication via:

  • Bearer Token: Authorization: Bearer sk-... or Authorization: Bearer cashuAeyJ0...
  • X-Cashu Header: X-Cashu: cashuAeyJ0... (for direct eCash payments)

See Authentication for details.

Chat

Create Chat Completion

Send messages to generate model responses.

POST /v1/chat/completions

Request Body:

{
  "model": "gpt-4",
  "messages": [
    {
      "role": "system",
      "content": "You are a helpful assistant."
    },
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "temperature": 0.7,
  "stream": false
}

Parameters:

Parameter Type Required Default Description
model string Yes - Model ID to use
messages array Yes - Array of message objects
temperature number No 1.0 Sampling temperature (0-2)
max_tokens integer No Model default Maximum tokens to generate
stream boolean No false Stream partial responses
top_p number No 1.0 Nucleus sampling
n integer No 1 Number of completions
stop string/array No null Stop sequences
presence_penalty number No 0 Presence penalty (-2 to 2)
frequency_penalty number No 0 Frequency penalty (-2 to 2)

Response:

{
  "id": "chatcmpl-123",
  "object": "chat.completion",
  "created": 1677652288,
  "model": "gpt-4",
  "choices": [{
    "index": 0,
    "message": {
      "role": "assistant",
      "content": "Hello! How can I help you today?"
    },
    "finish_reason": "stop"
  }],
  "usage": {
    "prompt_tokens": 13,
    "completion_tokens": 9,
    "total_tokens": 22
  }
}

Streaming Response

When stream: true:

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"model":"gpt-3.5-turbo","choices":[{"index":0,"delta":{"role":"assistant"},"finish_reason":null}]}

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"model":"gpt-3.5-turbo","choices":[{"index":0,"delta":{"content":"Hello"},"finish_reason":null}]}

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"model":"gpt-3.5-turbo","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}

data: [DONE]

Completions (Coming Soon)

Create Completion

Note: This endpoint is coming soon and not yet available.

Generate text completion (legacy endpoint).

POST /v1/completions

Request Body:

{
  "model": "gpt-3.5-turbo-instruct",
  "prompt": "Once upon a time",
  "max_tokens": 50,
  "temperature": 0.7
}

Response:

{
  "id": "cmpl-123",
  "object": "text_completion",
  "created": 1677652288,
  "model": "gpt-3.5-turbo-instruct",
  "choices": [{
    "text": " in a faraway land, there lived a brave knight...",
    "index": 0,
    "logprobs": null,
    "finish_reason": "length"
  }],
  "usage": {
    "prompt_tokens": 4,
    "completion_tokens": 50,
    "total_tokens": 54
  }
}

Embeddings

Create Embeddings (Coming Soon)

Note: This endpoint is coming soon and not yet available.

Generate vector representations of text.

POST /v1/embeddings

Request Body:

{
  "model": "text-embedding-3-small",
  "input": "The quick brown fox jumps over the lazy dog",
  "encoding_format": "float"
}

Parameters:

Parameter Type Required Default Description
model string Yes - Embedding model ID
input string/array Yes - Text(s) to embed
encoding_format string No "float" Format: "float" or "base64"
dimensions integer No Model default Output dimensions

Response:

{
  "object": "list",
  "data": [{
    "object": "embedding",
    "index": 0,
    "embedding": [0.0023064255, -0.009327292, ...] 
  }],
  "model": "text-embedding-3-small",
  "usage": {
    "prompt_tokens": 9,
    "total_tokens": 9
  }
}

Images (Coming Soon)

Create Image

Note: This endpoint is coming soon and not yet available.

Generate images from text prompts.

POST /v1/images/generations

Request Body:

{
  "model": "dall-e-3",
  "prompt": "A white siamese cat wearing a space helmet",
  "n": 1,
  "size": "1024x1024",
  "quality": "standard"
}

Parameters:

Parameter Type Required Default Description
model string Yes - Model: dall-e-2, dall-e-3
prompt string Yes - Text description
n integer No 1 Number of images
size string No "1024x1024" Image dimensions
quality string No "standard" Quality: standard, hd
style string No "vivid" Style: vivid, natural
response_format string No "url" Format: url, b64_json

Response:

{
  "created": 1677652288,
  "data": [{
    "url": "https://generated-image-url.com/image.png",
    "revised_prompt": "A white Siamese cat wearing a detailed space helmet..."
  }]
}

Audio (Coming Soon)

Create Transcription

Note: This endpoint is coming soon and not yet available.

Convert audio to text.

POST /v1/audio/transcriptions
Content-Type: multipart/form-data

Form Data:

Field Type Required Description
file file Yes Audio file (mp3, mp4, mpeg, mpga, m4a, wav, webm)
model string Yes Model ID (whisper-1)
language string No Language code (ISO-639-1)
prompt string No Context prompt
response_format string No Format: json, text, srt, verbose_json, vtt
temperature number No Sampling temperature

Response:

{
  "text": "Hello, this is the transcribed audio content."
}

Create Translation

Note: This endpoint is coming soon and not yet available.

Translate audio to English.

POST /v1/audio/translations
Content-Type: multipart/form-data

Same parameters as transcription, but always translates to English.

Models

List Models

Get available models and pricing.

GET /v1/models

Response:

{
  "object": "list",
  "data": [
    {
      "id": "gpt-3.5-turbo",
      "object": "model",
      "created": 1677610602,
      "owned_by": "openai",
      "permission": [...],
      "root": "gpt-3.5-turbo",
      "parent": null,
      "pricing": {
        "prompt": 0.001,
        "completion": 0.002,
        "unit": "1k tokens"
      }
    }
  ]
}

List Model Paths

Get the selectable upstream routes for each advertised model. This endpoint is discovery-only; request-side selection will be added separately.

GET /v1/models/paths

Response:

{
  "data": [
    {
      "id": "anthropic/claude-sonnet-4",
      "paths": [
        {
          "path": "url=https%3A%2F%2Fapi.anthropic.com%2Fv1&model-id=anthropic%2Fclaude-sonnet-4",
          "provider": {"slug": "anthropic-primary", "type": "anthropic"},
          "endpoint": null
        },
        {
          "path": "url=https%3A%2F%2Fopenrouter.ai%2Fapi%2Fv1&model-id=anthropic%2Fclaude-sonnet-4&endpoint=google-vertex%2Fus",
          "provider": {"slug": "openrouter-main", "type": "openrouter"},
          "endpoint": {"tag": "google-vertex/us", "name": "Google"}
        }
      ]
    }
  ],
  "updated_at": 1753500000
}

path is an opaque, percent-encoded selector. Clients must store and return it unchanged rather than parsing or reconstructing it. It identifies the route with url and model-id. To avoid exposing private network details, a configured private IP address or any URL with an explicit port is advertised as http://localhost. OpenRouter routes additionally preserve the exact machine-readable endpoint tag. Provider slugs/types and endpoint names remain display data. When request-side selection is implemented, an endpoint tag must not silently fall back to another backend.

A path names no provider, so several configured providers sharing an upstream URL collapse onto a single path. Such a path always routes to the cheapest of those providers, and the advertised slug, type and pricing describe that same cheapest provider. A pinned path never fails over: if the selected provider errors, the error is returned rather than retried elsewhere. Paths issued before this change still carry provider-id and are still honoured, pinning the exact provider they name.

List Paths for One Model

Use the exact model ID advertised by /v1/models. The query parameter safely supports IDs containing /.

GET /v1/models/paths/model?model_id=anthropic/claude-sonnet-4

The response uses the same path objects and updated_at field as the collection endpoint. An unknown model returns 404 Model not found. A known model whose paths have not been discovered yet returns 200 with an empty data array.

Wallet Management

Create Wallet (Coming Soon)

Note: This endpoint is coming soon. Currently, you can use Cashu tokens directly as API keys.

Create a new wallet with eCash deposit.

POST /v1/wallet/create

Request Body:

{
  "cashu_token": "cashuAeyJ0...",
  "admin_key": "optional-admin-key"
}

Response:

{
  "api_key": "sk-1234567890abcdef",
  "admin_key": "radmin_fedcba0987654321",
  "balance": 10000,
  "mint": "https://mint.example.com",
  "unit": "sat"
}

Get Key Information

Get current balance and consumption data for an API key.

GET /v1/balance/info
Authorization: Bearer sk-...

Response:

{
  "api_key": "sk-abc...",
  "balance": 8500000,
  "reserved": 0,
  "total_requests": 42,
  "total_spent": 1500000,
  "validity_date": null
}

balance is the spendable balance used by request admission.

Check Balance

Get current wallet balance.

GET /v1/wallet/balance
Authorization: Bearer sk-...

Response:

{
  "balance": 8500,
  "currency": "sat",
  "reserved": 0
}

Top Up Wallet

Add funds to existing wallet.

POST /v1/wallet/topup
Authorization: Bearer sk-...

Request Body:

{
  "cashu_token": "cashuAeyJ0..."
}

Response:

{
  "balance": 18500,
  "amount_added": 10000,
  "currency": "sat"
}

Refund Balance

Pay out the current balance. The key remains valid at zero balance and can be topped up again. The payout goes to a Lightning address when one is given (in the request or stored on the key), otherwise a Cashu token is returned.

POST /v1/balance/refund
Authorization: Bearer sk-...
Content-Type: application/json

/v1/wallet/refund is a deprecated alias.

Request Body (optional):

{
  "lightning_address": "user@getalby.com"
}

Parameters:

Parameter Type Required Default Description
lightning_address string No Key's stored refund address Lightning address or LNURL to pay. Overrides the stored address for this request. The effective address (request or stored) is resolved only for a request that can open a new claim, before any balance is debited.

Response (Lightning):

{
  "refund_id": "3f9c1e2d8b7a4c6e9f0a1b2c3d4e5f60",
  "status": "paid",
  "recipient": "user@getalby.com",
  "sats": "4500"
}

Response (Cashu):

{
  "refund_id": "3f9c1e2d8b7a4c6e9f0a1b2c3d4e5f60",
  "status": "paid",
  "token": "cashuAeyJ0...",
  "sats": "4500"
}

The amount field is sats or msats depending on the key's refund currency. It reports the gross balance debited by the claim. For Lightning refunds, mint and input fees can reduce the amount actually delivered to the recipient.

Behaviour:

  • The balance is debited and a refund claim is recorded before the payout is attempted. A key has at most one open claim at a time.
  • If the payout fails cleanly, the claim is closed and the balance is restored. Retry the request.
  • Once a melt quote has been recorded or a Cashu token has been issued, the payout may already have happened, so any later failure returns 502 and withholds the balance rather than restoring it. The exception is the mint answering the melt itself with unpaid: that is proof nothing was sent, so the balance is restored at once and the request returns 503.
  • If the Lightning payment is dispatched but the mint cannot confirm the outcome, the request returns 502, the balance stays withheld, and a background reconciler asks the mint until it answers. The balance is restored if the mint reports the payment unpaid.
  • An unresolved claim is reported before any replay: a request on a key with an open claim returns 409 with that claim's refund_id and status.
  • Calling again on a zero-balance key with no open claim returns the last paid Lightning refund, or the Cashu token issued by the last paid claim while it remains uncollected.

Errors:

Status Meaning
400 Invalid Lightning destination, no balance, or balance too small for the refund unit
400 Ongoing requests are still reserving balance on this key
401 Unknown key
409 Balance changed concurrently. Retry.
409 refund_in_progress: another refund claim for this key is still open. The body carries its refund_id and status
409 refund_unresolved: a claim for this key is stuck and needs operator reconciliation
410 Previously issued Cashu refund token has been swept
500 Payout failed before anything was dispatched. Balance restored. Retry.
502 Payment dispatched, outcome unconfirmed. Balance withheld pending reconciliation. Do not retry.
503 Mint unavailable, or the mint reported the Lightning payment unpaid. Balance restored. Retry later.

X-Cashu refunds:

Requests paid per-call with an X-Cashu header get their change from this endpoint by sending the same header instead of Authorization:

POST /v1/balance/refund
X-Cashu: cashuAeyJ0...

Returns the change token in the body and in an X-Cashu response header. 404 if no matching request exists, 425 while the change is still being minted, 410 if it was swept.

Provider Discovery

Admin Settings

These endpoints are protected by the Admin cookie (admin_password set to your configured admin password).

Get Settings

GET /admin/api/settings

Returns the current application settings (sensitive values may be redacted).

Update Settings

PATCH /admin/api/settings
Content-Type: application/json

Body is a partial JSON of settings fields to update. Validated and persisted to the database.

List Providers

Get available upstream providers.

GET /v1/providers

Response:

{
  "providers": [
    {
      "name": "openai",
      "models": ["gpt-4", "gpt-3.5-turbo"],
      "endpoints": ["chat/completions", "completions"],
      "status": "active"
    }
  ]
}

Provider Info

Get specific provider details.

GET /v1/providers/{provider_name}

Response:

{
  "name": "openai",
  "display_name": "OpenAI",
  "description": "Official OpenAI API",
  "models": [
    {
      "id": "gpt-4",
      "name": "GPT-4",
      "context_window": 8192,
      "pricing": {
        "prompt": 0.03,
        "completion": 0.06,
        "unit": "1k tokens"
      }
    }
  ],
  "endpoints": ["chat/completions", "completions", "embeddings"],
  "features": ["streaming", "function_calling"],
  "status": "active"
}

Rate Limiting

All endpoints are subject to rate limiting:

  • Per minute: 60 requests
  • Per hour: 1000 requests
  • Per day: 10000 requests

Rate limit information is included in response headers.

Next Steps

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