x402.orthogonal.com

Send a conversation to a model and get a completion back. Works exactly like the OpenAI chat completions endpoint. Pass messages and a model slug, get a response with the assistant's reply. Supports streaming for real-time token delivery, tool calling for function execution, structured outputs via response_format, and controllable reasoning depth on supported models. | ERROR: Unable to calculate price.

SearchLiveeip155:8453Exactvia cdp
Calls · 30d
105↓ 36%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$1.88
Verified settled volume
376 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
101
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-14 18:46Z
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xDEFaDa13F790cf39168691B391Cfa0b6f1f5c267

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0xDEFa…5c267. The signed payment is good for 5 minutes.

USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
5000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Token contract
EPjFWd…TDt1v
Payment window
5 minutes
5000units
on eip155:143 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Token contract
0x7547…fb603
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xDEFaDa13F790cf39168691B391Cfa0b6f1f5c267",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
    },
    "payTo": "6tBjD7Pyx9smaubkFaePv1NtfLh9jwLGu63MoozRmYvQ",
    "amount": "5000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0xDEFaDa13F790cf39168691B391Cfa0b6f1f5c267",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:143",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "model": "model",
          "messages": []
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "properties": {
                "n": {
                  "type": "number",
                  "description": "Number of completions to generate. Currently only supports 1."
                },
                "bad": {
                  "type": "string",
                  "description": "Words or phrases the model should avoid generating. Passed as a string."
                },
                "echo": {
                  "type": "boolean",
                  "description": "If true, prepends the last input message to the generated output."
                },
                "seed": {
                  "type": "number",
                  "description": "Integer for deterministic sampling. Same seed with same parameters should return the same result. Not guaranteed across model versions."
                },
                "stop": {
                  "type": "string",
                  "description": "Up to 4 sequences where the model will stop generating. Can be a string or array of strings."
                },
                "user": {
                  "type": "string",
                  "description": "A unique string identifying the end user. Useful for abuse monitoring and rate limiting."
                },
                "min_p": {
                  "type": "number",
                  "description": "Minimum probability threshold. Tokens below this probability relative to the most likely token are filtered out."
                },
                "model": {
                  "type": "string",
                  "description": "Model slug to run inference against. Available models: deepseek-ai/DeepSeek-V3-0324 (164k context, reasoning), deepseek-ai/DeepSeek-V3.1 (164k context, reasoning), zai-org/GLM-4.6 (200k context, reasoning), zai-org/GLM-4.7 (200k context, reasoning), moonshotai/Kimi-K2-Instruct-0905 (128k context), moonshotai/Kimi-K2-Thinking (262k context, always-on reasoning), moonshotai/Kimi-K2.5 (262k context), openai/gpt-oss-120b (128k context). Reasoning models support the reasoning_effort parameter for controlling thinking depth."
                },
                "tools": {
                  "type": "array",
                  "description": "Array of tool/function definitions the model can call. Each tool has {\"type\": \"function\", \"function\": {\"name\": \"...\", \"description\": \"...\", \"parameters\": {...}}}. The model may respond with tool_calls instead of content."
                },
                "top_k": {
                  "type": "number",
                  "description": "Top-K sampling. Only the K most likely next tokens are considered. Lower values make output more focused."
                },
                "top_p": {
                  "type": "number",
                  "description": "Nucleus sampling threshold between 0 and 1. Only tokens within this cumulative probability mass are considered. 0.1 means only the top 10%. Use as an alternative to temperature."
                },
                "stream": {
                  "type": "boolean",
                  "description": "If true, returns server-sent events (SSE) with partial message deltas as tokens are generated, instead of waiting for the full response."
                },
                "best_of": {
                  "type": "number",
                  "description": "Number of candidate completions to generate server-side, returning the best. Currently only supports 1."
                },
                "logprobs": {
                  "type": "boolean",
                  "description": "If true, returns the log probabilities of each output token in the response."
                },
                "messages": {
                  "type": "array",
                  "description": "Array of message objects, each with a 'role' (system, user, assistant, tool) and 'content' (string or array of content parts). This is the conversation history sent to the model."
                },
                "documents": {
                  "type": "array",
                  "description": "Array of document objects for retrieval-augmented generation (RAG). Each document has content the model can reference when responding."
                },
                "top_p_min": {
                  "type": "number",
                  "description": "Minimum dynamic nucleus sampling threshold. Sets a floor for top_p when using adaptive sampling."
                },
                "ignore_eos": {
                  "type": "boolean",
                  "description": "If true, the model continues generating past the end-of-sequence token."
                },
                "logit_bias": {
                  "type": "object",
                  "description": "Map of token IDs to bias values (-100 to 100). Increase or decrease the likelihood of specific tokens appearing in the output."
                },
                "max_tokens": {
                  "type": "number",
                  "description": "Maximum number of tokens to generate in the response. Default is 4096."
                },
                "min_tokens": {
                  "type": "number",
                  "description": "Minimum number of tokens to generate before any stop condition can trigger."
                },
                "temperature": {
                  "type": "number",
                  "description": "Sampling temperature between 0 and 4. Lower values (e.g. 0.2) produce more focused, deterministic output. Higher values (e.g. 1.5) increase creativity. Default is 1."
                },
                "tool_choice": {
                  "type": "string",
                  "description": "Controls tool calling behavior. 'auto' lets the model decide, 'none' disables tools, 'required' forces a tool call, or pass {\"type\": \"function\", \"function\": {\"name\": \"...\"}} to force a specific tool."
                },
                "top_logprobs": {
                  "type": "number",
                  "description": "How many of the most likely tokens (0-20) to return log probabilities for at each position. Requires logprobs to be true."
                },
                "bad_token_ids": {
                  "type": "array",
                  "description": "Array of token IDs that should never appear in the output."
                },
                "chat_template": {
                  "type": "string",
                  "description": "Custom Jinja2 template for formatting the conversation. Overrides the model's default chat template."
                },
                "early_stopping": {
                  "type": "boolean",
                  "description": "In beam search, stop as soon as the required number of complete candidates are found."
                },
                "length_penalty": {
                  "type": "number",
                  "description": "Penalty applied during beam search. Values > 1.0 favor longer sequences, < 1.0 favor shorter ones."
                },
                "stop_token_ids": {
                  "type": "array",
                  "description": "Array of token IDs that will cause generation to stop when produced."
                },
                "stream_options": {
                  "type": "object",
                  "description": "Options for streaming. Use {\"include_usage\": true} to get a final chunk with token usage statistics."
                },
                "response_format": {
                  "type": "object",
                  "description": "Constrain the output format. Use {\"type\": \"json_object\"} for JSON mode, or {\"type\": \"json_schema\", \"json_schema\": {\"name\": \"...\", \"schema\": {...}}} for structured outputs with a specific schema."
                },
                "presence_penalty": {
                  "type": "number",
                  "description": "Penalize tokens based on whether they've appeared at all. Range -2.0 to 2.0. Positive values encourage the model to explore new topics. Default: 0."
                },
                "reasoning_effort": {
                  "type": "string",
                  "description": "Controls thinking depth for reasoning models. Options: 'low', 'medium', 'high'. Default: 'medium'. Higher effort uses more tokens but produces more thorough reasoning. Supported on DeepSeek V3/V3.1, GLM 4.6/4.7, and Kimi K2 Thinking."
                },
                "frequency_penalty": {
                  "type": "number",
                  "description": "Penalize tokens based on how often they've appeared so far. Range -2.0 to 2.0. Positive values reduce repetition. Default: 0."
                },
                "add_special_tokens": {
                  "type": "boolean",
                  "description": "If true, adds special tokens (like BOS) to the input. Default: true."
                },
                "chat_template_args": {
                  "type": "object",
                  "description": "Additional arguments passed to the chat template as template variables."
                },
                "repetition_penalty": {
                  "type": "number",
                  "description": "Multiplicative penalty for repeated tokens. Values > 1.0 discourage repetition, < 1.0 encourage it."
                },
                "parallel_tool_calls": {
                  "type": "boolean",
                  "description": "Whether the model can make multiple tool calls in parallel in a single response. Default: true."
                },
                "skip_special_tokens": {
                  "type": "boolean",
                  "description": "If true, special tokens are removed from the output text. Default: true."
                },
                "disaggregated_params": {
                  "type": "object",
                  "description": "Advanced parameters for distributed inference. Only relevant for disaggregated serving configurations."
                },
                "add_generation_prompt": {
                  "type": "boolean",
                  "description": "If true, applies the model's generation prompt template. Usually needed for chat models."
                },
                "truncate_prompt_tokens": {
                  "type": "number",
                  "description": "Truncate the prompt to this many tokens if it exceeds the limit, keeping the most recent tokens."
                },
                "include_stop_str_in_output": {
                  "type": "boolean",
                  "description": "If true, includes the stop string in the generated output rather than trimming it."
                },
                "spaces_between_special_tokens": {
                  "type": "boolean",
                  "description": "If true, adds spaces between special tokens in the detokenized output."
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-14 18:46Z
Last indexed by Roundhouse
2026-09-24 10:30Z
Last enriched (probe, favicon, geo)
2026-09-24 03:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 404
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service x402.orthogonal.com and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402.orthogonal.com'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://x402.orthogonal.com/baseten/v1/chat/completions, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.