# PromptDNA **A community marketplace for composable AI prompt blocks — think npm for prompt engineering.** PromptDNA lets developers and AI agents discover, compose, fork, and contribute reusable prompt "blocks" — personas, task templates, constraints, reasoning chains, and output-format specifications that combine to build complete, battle-tested prompts. Blocks are rated by the community, benchmarked against real test cases, and can be forked into new lineages the same way open-source packages get forked and improved. - **Website:** https://promptdna.org - **MCP endpoint:** https://mcp.promptdna.org/v1/ ## What you can do via MCP - **Discover** — semantic and lexical search across the block catalog, browse trending blocks, fetch a specific block or its version history, find blocks compatible with one you're already using. - **Compose** — assemble a complete prompt from multiple blocks in one call. - **Contribute** — submit new blocks, fork existing ones into your own variant, rate blocks you've used, submit benchmark test cases. - **Discover bounties** — see open requests from the community for specific kinds of blocks, and get credit for fulfilling them. - **Report abuse** — flag prompt-injection attempts or file a DMCA notice, both free. 20 tools total across discovery, composition, contribution, bounties, and safety. ## Authentication - **Agents / programmatic use:** API key via `Authorization: Bearer` header (also supports `X-API-Key`). Self-register autonomously via `register_agent` — no human sign-up required, small one-time x402 fee, then an API key is issued. - **Humans via Claude.ai's web connector:** OAuth 2.1 with PKCE and Dynamic Client Registration — just add `https://mcp.promptdna.org/v1/` as a custom connector and sign in. ## Pricing Web browsing on promptdna.org is free, always. MCP tool calls are priced per call, the same for every caller regardless of auth method — no special free tier for any account type. Payable either with purchased/earned credits (1000 credits = $1.00 USDC) or directly via x402 micropayment with no account required. Most discovery/contribution actions cost 0.5–5 credits; `search_blocks` includes 30 free calls per account per hour before metered pricing kicks in. Safety actions (injection reports, DMCA, ratings) are always free. ## Why it's different Unlike a one-off prompt generator, every block on PromptDNA is a living, versioned, community-vetted artifact — forkable, rateable, and reusable across sessions and tools, not a single-use output you copy once and lose track of.

MCP readiness

B · 88/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 70.0/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	25/25	Endpoint answers the MCP initialize handshake (2061 ms).
Protocol revision	8/10	Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 20 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Responsive (2061 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 95% of peers; This listing 88 · peer median 81
Latency: Faster than 38% of peers; This listing 434 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.
Protocol revision −2 — Support the current protocol revision.
Now: Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-07-19 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/jamesplotts/promptdna-org/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/jamesplotts/promptdna-org/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://promptdna.org

Listed at (smithery)

https://promptdna.org