Sparxx.io helps businesses discover and evaluate potential customers by identifying companies that match their ideal customer profile. Research company details, analyze buying signals, find relevant decision-makers, and build targeted prospect lists for B2B sales and account-based marketing.
OpenCode is an open-source agent for the terminal. Remote MCP servers go in its config file and sign in through OAuth.
This guide connects Sparxx.io MCP to OpenCode through MewCP, so OpenCode can use Sparxx.io MCP's 10 tools, like get_cost, confirm_cost and create_timestamp, without your Sparxx.io MCP credentials ever reaching the app.
Sparxx.io MCP signs in through managed OAuth. MewCP stores the token encrypted, refreshes it before it expires and injects it only at call time. Your agent never holds it, so it can never leak it.
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Sparxx.io MCP works the same way in every client below. Pick yours for its own guide.
Free to start.
Scope access to the exact Sparxx.io 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.
Edit ~/.config/opencode/opencode.json, or opencode.json in your project root.
Start a new chat and ask: "List the tools you can use from MewCP." You should see your connected apps.
Step 1 before creating a timestamp. Returns what one timestamp costs through this connection, the person's spArks balance, and whether the balance covers it. Tell them the cost in plain terms (1 spArk = $0.01) and ask before spending anything. If the balance is too low, don't call confirm_cost. Tell them they can get 50 free spArks with the spArxx.io mobile app (one welcome bonus per device, linked to this account), or buy spArks at app.sparxx.io. get_free_sparks lists more.
Step 2 before creating a timestamp. Call this only after the person has agreed to the cost from get_cost. It records their agreement for one specific file and returns a single-use confirmation_id for create_timestamp. Pass the same file hash and the exact cost they agreed to as quoted_cost. A confirmation covers one file at the current price and expires after 10 minutes. If it expires or the price changes, start again with get_cost.
Register a timestamp for something the person created. spArxx.io is built for human creators to register and protect what they brought into existence, ideally before the work is sent, submitted or uploaded anywhere: a manuscript before it goes to an agent, a track before it's uploaded, art before it's posted. What comes back is an independently verifiable record of having registered that exact file first, anchored to the Polygon blockchain. It proves the file existed from the moment it's registered, not earlier, so the sooner a work is registered, the stronger the record. spArxx.io never receives the file, only its SHA-256 fingerprint of the exact original and its exact size in bytes. Let the person choose how to get them: privately, by making them on their own device and pasting them here (at app.sparxx.io/fingerprint, which works on a phone, uploads nothing and copies both, or with `shasum -a 256 <file>` on Mac or Linux, `certutil -hashfile <file> SHA256` on Windows); or by attaching the file here for you to hash, in which case the file becomes part of this chat with their AI provider. They can also create the timestamp in the spArxx.io web or mobile app, which hashes on their device. This spends spArks: call get_cost, tell the person the price, and only after they agree call confirm_cost and pass its confirmation_id here. Afterwards, check get_evidence until the status is 'submitted'.
Lists the person's timestamped items, newest first, with their status. Use it when they ask what they've timestamped, want to find something by file name, or need an evidence ID. For one item's full receipt and verification link, call get_evidence.
Returns the full receipt for one timestamped item: its file fingerprint (SHA-256 hash), name, size and status, plus the blockchain transaction, explorer link and verification link once it's recorded. Right after a timestamp is created the status is 'pending' until the blockchain transaction settles, usually within a few minutes. Check again until it's 'submitted', then share the verification link with the person.
Returns the person's spArks balance. spArks are the prepaid credits used to create timestamps (1 spArk = $0.01). Checking balances, listing and retrieving evidence, and verifying certificates are free. If the balance is 0 or too low for a timestamp, tell them: 50 free spArks with the spArxx.io mobile app (one welcome bonus per device, linked to this account), or buy spArks at app.sparxx.io; get_free_sparks lists more. If this connection can't create timestamps (there's no create_timestamp tool), they can create them in the spArxx.io web or mobile app.
Shows the ways this person can get free spArks and which they've already received: the welcome bonus they got (if any), a 1-minute survey (25 spArks, once per account), and the spArxx.io mobile app (50 spArks per new device). Use it when they ask about free spArks, when their balance is too low for a timestamp, or when they're new to spArxx.io. Present the options in plain words, with the links. For the survey, ask the person each question yourself and send their own answers with submit_survey; don't answer for them or guess from the conversation.
Records the person's answers to the short spArxx.io survey and adds 25 free spArks to their account, once per account. Get the questions and choices from get_free_sparks, ask the person each one, and send their own words. Don't answer for them or fill in answers from the conversation. what_you_create can include more than one choice; more_useful is optional.
Returns current spArxx.io prices: what a timestamp costs in spArks when created through an AI connection and in the spArxx.io apps, and the spArk-to-USD rate. Use it to answer general pricing questions. Prices can change, so check again rather than reusing an earlier answer. For this person's exact cost right before a timestamp, use get_cost where it's available.
Checks a spArxx.io timestamp by its blockchain transaction hash, which is on every certificate, receipt and verification link. Confirms what was recorded on-chain (the file fingerprint and the time) without needing a spArxx.io account. Use it when anyone, including someone who received a certificate from someone else, wants to know it's genuine. To check that a particular file matches, compare its SHA-256 hash with the recorded fingerprint. app.sparxx.io/fingerprint makes one.
