Sablebolt

Name: Sablebolt
Author: Sablebolt

AgentA2A

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30-day availability1/1 checks ok

30 days agotoday

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Account-free crypto swaps between two addresses: no account, no sign-up, a floating rate, the network fee shown before sending. Over MCP and a REST API (OpenAPI): read-only tools for assets and routes, limits, quotes, address validation, swap status, payment links and signed status notifications, plus create_swap for an agent that controls the sending wallet and pays the payment instruction itself. For a person the swap is created on the page, from their own wallet. There is no A2A task endpoint.

swaproutesassetsnetworksquoteestimateratefeeusdtusdcfeesstatustransactionhandoffdepositwalletagentpayment instructionpaymentinvoicelinkwebhooknotifications

Declared skills

List swap routes — Which assets and routes can be swapped right now, with network, confirmations and arrival estimates.
Get a swap estimate — Estimate what arrives for an amount on a route, including the network fee. Floating rate; the final amount is set when the deposit confirms.
Compare USDT and USDC networks — For a token held on one network, compare arrival time, confirmations, fee token and address format on the other networks.
Check swap status — Stage, deposit address and both transaction hashes of a swap by its id.
Prepare a swap for a person — Open https://sablebolt.io/swap/{from}/{to}?amount={amount} (or the MCP tool swap_page_link) with the route and amount preselected; the person pastes both addresses, gets a one-time deposit address and sends from their own wallet.
Create a swap and pay it from a wallet you control — For agents with their own wallet: POST /v1/swaps (or the MCP tool create_swap) with the route, the amount, the address you send from and the address that receives. The answer carries a payment instruction — the one-time deposit address, the memo if the chain needs one, the exact amount in decimal and base units with the decimals and token contract as listed by the liquidity partner, a wallet URI where a standard exists (BIP-21, ERC-681, Solana Pay, Monero, TON) — and the status URL. Send the de…
Create a payment link — Build a link that asks the payer for a set amount of one asset at one address. The payer opens it, pays with whatever they hold and gives the address they send from; the swap delivers the asset to the receiving address at the floating rate. No account on either side.
Subscribe to swap status notifications — Stage, deposit address and both transaction hashes of a swap by its id. A client holding the swap id can register an https URL and a secret to receive a signed swap.status event on every status or stage change instead of polling; the response carries a management token for DELETE and replacement (Authorization: Bearer); events are signed over timestamp.body (X-Sablebolt-Timestamp, X-Sablebolt-Signature: sha256=<hex HMAC-SHA256>; reject a timestamp more than 300 s off); one subscription per swap…

kind A2A Agent Card

name A2A Agent Card

summary A2A Agent Card

version A2A Agent Card

description A2A Agent Card

homepageUrl A2A Agent Card

publisherUrl A2A Agent Card

publisherName A2A Agent Card

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A2A Agent Cardhttps://sablebolt.io/.well-known/agent-card.json

first seen 8 h ago · fetched 8 h agoopen ↗

Field history (7 recent events)

8 h ago · declared · summary → "Account-free crypto swaps between two addresses: no account, no sign-up, a floating rate, the network fee shown before
8 h ago · declared · description → "Account-free crypto swaps between two addresses: no account, no sign-up, a floating rate, the network fee shown before
8 h ago · declared · publisherName → "Sablebolt"
8 h ago · declared · publisherUrl → "https://sablebolt.io"
8 h ago · declared · homepageUrl → "https://sablebolt.io/developers"
8 h ago · declared · version → "1.0.0"
8 h ago · declared · protocols → ["a2a"]

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