Add Printr plugin

[alanrsoares]

Adds a Base MCP plugin for Printr, a cross-chain token launchpad.

What it does

Lets an agent quote, build, and launch a token on Printr from chat. The plugin reads and builds an unsigned EVM transaction over Printr's public HTTP API, then submits the raw { to, value, data } calldata through Base MCP send_calls — the user signs and broadcasts via their Base Account. Covers the EVM chains Base MCP supports: base, arbitrum, optimism, polygon, bsc, avalanche, ethereum.

• integration: http-api — Printr's API is public (no auth). Build calldata via POST /print, submit via send_calls.
• File: skills/base-mcp/plugins/printr.md

Notes for review

• http-api, not external-mcp. Printr ships its own MCP server, but this plugin intentionally talks to the public HTTP API directly so the write always routes through Base MCP send_calls (the smart-wallet approval gate) rather than Printr's own signer. No extra MCP install required — Base MCP only.
• Followed the merged-plugin house style (bankr/uniswap) over the newer canonical spec headings: 2-field frontmatter, prose overview, ## API, send_calls mapping as an Orchestration subsection, Execution Warnings / Safety Notes / Notes. Conforms to tone.md (onchain, no web3).
• API host: currently points at api-preview.printr.money. Happy to repoint at the stable production host before merge if preferred — flag it and I'll push the change.

Authored per the plugin spec and verified against the Authoring Checklist.

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[stephancill]

Thanks for the submission. There are structural conformance gaps and the documented API does not currently function, both of which need to be resolved before this can be reviewed for merge.

Required — structure

• The frontmatter is missing nearly all required fields: tags, name, version, integration, chains, and the capability flags. These are the routing/discovery signals surfaced in the SKILL.md table, so without them the plugin is undiscoverable. Add the full frontmatter block.
• The required ## Surface Routing and ## Submission sections are absent. Add them.
• Non-canonical headings: ## API, ## Execution Warnings, ## Safety Notes. Rename to ## Endpoints and fold the warnings into ## Risks & Warnings.

Required — functional

• "All endpoints are public (no auth)" is incorrect. api.printr.money requires authentication (returns 401) and the production OpenAPI gates all endpoints behind bearerAuth. Correct the documented auth model and set auth accordingly.
• The documented host api-preview.printr.money/v0 returns HTTP 500 on every endpoint (/print/quote, /print, /tokens/{id}), so the plugin cannot build calldata against it. Point the plugin at a working, stable production host.

Minor

• Request schema mismatches that would fail the quote/build calls even with valid auth:
  • initial_buy is documented as a bare string ("0.1"), but the API requires an object (VariableInitialBuy) selecting one of three denomination modes: {spend_native: "<amount>"}, {spend_usd: <amount>}, or {supply_percent: <amount>}. A bare string is ambiguous (native vs USD vs percent), so the backend rejects it. Update the field type and examples, and pass whichever variant the user specifies.
  • graduation_threshold_per_chain_usd: 5000 is below the schema minimum of 15000 (max 1000000). Use an in-range value in the examples.