BSV.CX enables AI agents to timestamp and verify digital evidence on the Bitcoin SV blockchain. Hash documents without revealing their contents, archive web pages with cryptographic proofs, retrieve historical captures, and independently verify records to establish when content existed.
The fastmcp library is a Python client for MCP servers. Use it to call MewCP tools from your own scripts and services.
This guide connects BSV.CX MCP to Python through MewCP, so Python can use BSV.CX MCP's 9 tools, like notarize_hash, verify_hash and spv_verify.
BSV.CX MCP needs no credentials, but every call still runs through MewCP: scoped, checked and logged like any other.
More apps
Clerk enables AI agents to manage application authentication, user accounts, organizations, sessions, and access permissions, including inspecting user profiles and configuring authentication workflows.
OnChainDiligence helps AI agents evaluate autonomous payment proposals against caller-defined policies, retrieve signed payment receipts, and independently verify receipt integrity and authenticity. Provides evidence for auditing agent payment decisions without holding funds, signing transactions, or executing payments.
ConsentStack automates website cookie consent management by creating and publishing consent banners, configuring privacy settings, detecting and categorizing tracking scripts, running compliance scans, and reviewing consent analytics and logs for GDPR and other privacy regulations.
CourtListener provides searchable access to U.S. case law, court opinions, dockets, judicial decisions, and legal filings. Find cases by citation, keyword, court, or judge; retrieve opinion texts and docket records; and research legal precedents using data from federal and state courts.
Other clients
BSV.CX MCP works the same way in every client below. Pick yours for its own guide.
Free to start.
Scope access to the exact BSV.CX MCP tools and accounts you allow, work and personal side by side. Anything outside that scope is refused at call time, even when the model asks for it.
Each call is logged: what ran, on which account, and whether it worked. Failures come back structured, so the agent knows whether to retry instead of guessing.
Every app sits behind one secure MCP URL, and there is no server for you to deploy or keep running. Add an integration in the dashboard and it is live on the next call, with no config to change and no new credentials to wire up. Tools load only when a task needs them, so your agent stays fast and focused however many apps you connect.
SDK clients sign in with an API key. Create one in your dashboard and replace API_KEY in the code below.
SDK clients run without a browser, so they sign in with your API key.
Anchor a sha256 digest in a Bitcoin SV transaction, proving the content existed at this time. Send ONLY the hash — the content never leaves your machine, and bsv.cx cannot see what was hashed. Free. Idempotent: the same hash returns the same record.
Look up a sha256 across EVERY bsv.cx protocol — notary timestamps, verifiable-fetch receipts, notarized captures, web-page archives, Merkle batch roots and attestations — and return when it was anchored and the transaction that proves it. A hash anchored by any of these counts as found. Free, and never rate-limited into unavailability.
Verify ANY Bitcoin (BSV) Merkle inclusion proof — a BEEF envelope (BRC-62), a BUMP (BRC-74), or a raw TSC proof — against block headers bsv.cx syncs itself over the BSV P2P network, NOT an explorer. Returns confirmed / rejected / inconclusive. This is the trustless core: you send only the proof (never the root), we fold the root ourselves and check it against a header we hold — so you never have to trust bsv.cx. Works for ANY txid's proof, not just bsv.cx's own anchors. Free.
For any CONFIRMED BSV transaction id, get a freshly SPV-verified bundle: BEEF (BRC-62) and BUMP (BRC-74) plus bsv.cx's own self-synced header-tip attestation. bsv.cx fetches the Merkle proof and folds it against block headers it syncs over the BSV P2P network BEFORE serving, so you receive a bundle that already confirms — verifiable by any @bsv/sdk client with no bsv.cx-specific code. Verification itself is free at /spv/verify; this does the fetch + fold + package for you and is priced per call (pay over HTTP with an x402 payment — see /pay).
Capture a web page as it looks right now — screenshot and text — and anchor a hash of that capture on-chain. Use this before relying on a page you cite, so a later edit or deletion cannot be denied. Free.
Fetch the manifest for a previous archive_url capture: when it was taken, and its proof. Free.
Fetch a URL as readable text AND get a receipt anchoring a hash of the exact bytes returned, so you can later prove what the page said when you read it. Priced per call (pay over HTTP with an x402 payment — see /pay).
Anchor a Merkle root over many sha256 digests in a single transaction — far cheaper per item than notarizing each one. Each hash gets an inclusion proof. Priced per call (pay over HTTP with an x402 payment — see /pay).
Report whether anchoring is currently working. Call this if a tool reports something stored but not anchored.
