Siro lets an assistant browse a catalog of pay-per-call AI resources and run them by paying in stablecoins over x402.
What you can do
List and search the catalog of 67 paid resources with prices and categories
Inspect a resource's input schema, example input, output and endpoint before calling
Run a resource by submitting a signed x402 payment payload
Search the open x402 Bazaar index for third-party paid APIs and check whether Siro can pay them
List tokens a Siro wallet can swap through KyberSwap on a given network
When to use it
Useful when an agent should call paid AI capabilities (LLMs, image, audio, video, market data) or discover other x402-paid APIs without managing separate provider accounts and keys.
Requirements
A remote streamable HTTP endpoint; no packages or environment variables declared. Calls require a signed x402 v2 payment payload supplied in the tool parameters, funded in USDG on Robinhood Chain or USDC on Solana, Base, Arbitrum or Polygon. The server notes a Siro CLI for automatic, capped payments from a local wallet.
Before you install
siro_call spends real money at the resource's USD price on every call, so costs accumulate per invocation. It requires a signed payment payload from a wallet, and the CLI option allows automatic payments from a local wallet. Browsing the catalog and schemas is free, but discovery results point to third-party services outside Siro.
Enable the server for the chats that should use its tools.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Use with an agent
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/com.siroagent%2Fsiro/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.
Lists Siro's pay-per-call resources (67 in total) with id, name, category, USD price and a one-line summary. Use it first to find the right resource id; then read its input schema with siro_resource_schema and run it with siro_call. Categories: LLMs, image generation, audio (speech and transcription), vision, web (reading and translation), on-chain data on Robinhood Chain and Base, tokenized stocks, Polymarket prediction markets and content tools. Free, no payment needed.
Parametersquerycategory
siro_resource_schema
Get one resource's input schema
Returns everything needed to call one Siro resource: its USD price, the JSON Schema of its input, a ready-to-use example input, what it returns, and its HTTP endpoint. Use it after siro_resources and before siro_call so the input is valid (invalid input is rejected before any payment). Free, no payment needed.
Parametersidrequired
siro_call
Run a paid resource (x402)
Runs one Siro resource and pays its exact USD price over x402, in USDG on Robinhood Chain or USDC on Solana, Base, Arbitrum or Polygon. Send a signed x402 v2 PaymentPayload in params._meta["x402/payment"]; without it the tool returns isError with the payment requirements (price, networks, payTo) to sign. The work runs before the payment settles, so failed calls are never charged; a successful call returns the result plus a receipt with the transaction hash in _meta["x402/payment-response"]. Agents without an x402 wallet can use the Siro CLI (`siro mcp`), which pays automatically within spending caps.
Parametersinputresourcerequired
siro_discover
Find third-party x402 services
Searches the open x402 Bazaar index (run by Coinbase CDP) for paid APIs outside Siro's own catalog, such as weather, web search, data enrichment or token prices. Returns each service's URL, HTTP method, price, accepted networks, an example input and whether Siro can pay it (payable = accepts USDG on Robinhood Chain or USDC on Solana, Base, Arbitrum or Polygon). Use it when no Siro resource fits the task. Free, no payment needed.
Parameterslimitqueryrequired
siro_tokens
List swappable tokens
Lists the tokens a Siro wallet can swap through the KyberSwap aggregator on one network, with symbol, name and contract address. On Robinhood Chain this includes ETH, WETH, USDG and every Robinhood stock token (TSLA, NVDA, AAPL…); on Base it includes ETH, WETH and USDC. Use it to resolve a ticker to its contract address before quoting or executing a swap with the Siro CLI. Read-only and free; it does not trade.
Parametersnetwork
Version history
1
v1.0.0LatestNov 14, 2026
Score
83%
83% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.
