Config is the same across clients — only the file and path differ.
{
"mcpServers": {
"io-github-srotzin-hive-mcp-abtest": {
"args": [
"-y",
"npm"
],
"command": "npx"
}
}
}Are you the author?
Add this badge to your README to show your security score and help users find safe servers.
A/B experiment runner for the A2A network. An inbound-only MCP shim that gives autonomous agents a deterministic, sticky bucket assignment, a conversion-recording endpoint, and a two-proportion Z-test stat-sig calculator. Pricing is per call via x402 on Base USDC.
Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.
npx -y 'npm' 2>&1 | head -1 && echo "✓ Server started successfully"
After testing, let us know if it worked:
Five weighted categories — click any category to see the underlying evidence.
Packing does not respect root-level ignore files in workspaces
### Impact `npm pack` ignores root-level `.gitignore` & `.npmignore` file exclusion directives when run in a workspace or with a workspace flag (ie. `--workspaces`, `--workspace=<name>`). Anyone who has run `npm pack` or `npm publish` with workspaces, as of [v7.9.0](https://github.com/npm/cli/releases/tag/v7.9.0) & [v7.13.0](https://github.com/npm/cli/releases/tag/v7.13.0) respectively, may be affected and have published files into the npm registry they did not intend to include. ### Patch - Up
Incorrect Permission Assignment for Critical Resource in NPM
An issue was discovered in an npm 5.7.0 2018-02-21 pre-release (marked as "next: 5.7.0" and therefore automatically installed by an "npm upgrade -g npm" command, and also announced in the vendor's blog without mention of pre-release status). It might allow local users to bypass intended filesystem access restrictions because ownerships of /etc and /usr directories are being changed unexpectedly, related to a "correctMkdir" issue.
Local Privilege Escalation in npm
Affected versions of `npm` use predictable temporary file names during archive unpacking. If an attacker can create a symbolic link at the location of one of these temporary file names, the attacker can arbitrarily write to any file that the user which owns the `npm` process has permission to write to, potentially resulting in local privilege escalation. ## Recommendation Update to version 1.3.3 or later.
npm CLI exposing sensitive information through logs
Versions of the npm CLI prior to 6.14.6 are vulnerable to an information exposure vulnerability through log files. The CLI supports URLs like `<protocol>://[<user>[:<password>]@]<hostname>[:<port>][:][/]<path>`. The password value is not redacted and is printed to stdout and also to any generated log files.
npm Vulnerable to Global node_modules Binary Overwrite
Versions of the npm CLI prior to 6.13.4 are vulnerable to a Global node_modules Binary Overwrite. It fails to prevent existing globally-installed binaries to be overwritten by other package installations. For example, if a package was installed globally and created a `serve` binary, any subsequent installs of packages that also create a `serve` binary would overwrite the first binary. This will not overwrite system binaries but only binaries put into the global node_modules directory. This b
Click any tool to inspect its schema.
Be the first to review
Have you used this server?
Share your experience — it helps other developers decide.
Sign in to write a review.
Others in finance
Let AI agents create, discover, and track tokens across chains via Printr.
Real-time financial market data: stocks, forex, crypto, commodities, and economic indicators
Swiss accounting integration for Bexio. 310 tools for invoices, contacts, projects.
Brazilian public procurement (PNCP) and Federal Revenue CNPJ data — 16 tools, 4 prompts.
MCP Security Weekly
Get CVE alerts and security updates for io.github.srotzin/hive-mcp-abtest and similar servers.
Start a conversation
Ask a question, share a tip, or report an issue.
Sign in to join the discussion.
A/B experiment runner for the A2A network. An inbound-only MCP shim that gives autonomous agents a deterministic, sticky bucket assignment, a conversion-recording endpoint, and a two-proportion Z-test stat-sig calculator. Pricing is per call via x402 on Base USDC.
$0.001 per abtest_assign$0.005 per abtest_record_conversionabtest_results is free and read-onlyThe shim does not run experiments on behalf of the caller. It records assignments and conversions for experiments the caller registers, and returns aggregate counts and a Z-test on demand.
Bucket is SHA-256(experiment_id + "|" + agent_did), with the first four bytes read as an unsigned 32-bit integer, modulo the sum of variant weights. The first call writes the result. Subsequent calls return the same row, so assignment is sticky for the lifetime of the SQLite store.
A variant list is [{ id, weight? }, ...]. Weight defaults to 1 per variant. Pass [{id:"control"},{id:"treatment",weight:3}] for a 25/75 split.
Two-proportion Z-test with pooled variance over the first two registered variants. Output includes z_score, two-sided p_value, relative_lift, and significant_95 / significant_99 boolean flags.
2024-11-05POST /mcpTools:
| Tool | Tier | Price |
|---|---|---|
abtest_assign | 3 | $0.001 |
abtest_record_conversion | 3 | $0.005 |
abtest_results | 0 | free |
| Method | Path | Purpose |
|---|---|---|
| GET | /v1/abtest | List experiments |
| POST | /v1/abtest | Create or upsert experiment { id, name?, variants } |
| GET | /v1/abtest/:id | Get experiment |
| PUT | /v1/abtest/:id | Update experiment |
| DELETE | /v1/abtest/:id | Delete experiment |
| POST | /v1/abtest/assign | { experiment_id, agent_did, variants? } — $0.001 |
| POST | /v1/abtest/convert | { experiment_id, agent_did, metric?, value? } — $0.005 |
| GET | /v1/abtest/results | ?experiment_id=...&metric=... — Z-test included |
| GET | /v1/abtest/today | UTC-day assignment + conversion counts |
| GET | /health | Liveness, version, and DB check |
SQLite at /tmp/abtest.db with three tables: experiments, assignments, conversions. Override with DB_PATH.
| Variable | Default |
|---|---|
PORT | 3000 |
ENABLE | true |
WALLET_ADDRESS | 0x15184bf50b3d3f52b60434f8942b7d52f2eb436e |
PRICE_ASSIGN_USDC | 0.001 |
PRICE_CONVERT_USDC | 0.005 |
DB_PATH | /tmp/abtest.db |
X402_ENABLED | true |
Set X402_ENABLED=false to bypass payment gating in local development.
npm install
npm start
# in another shell
curl -s http://localhost:3000/health
curl -s -X POST http://localhost:3000/v1/abtest \
-H 'content-type: application/json' \
-d '{"id":"prompt_v2","name":"prompt v2","variants":[{"id":"control"},{"id":"treatment","weight":3}]}'
curl -s -X POST http://localhost:3000/v1/abtest/assign \
-H 'content-type: application/json' -H 'x-payment: {}' \
-d '{"experiment_id":"prompt_v2","agent_did":"did:hive:demo:1"}'
The first call without a paid x402 envelope returns a 402 body with a fresh nonce. Submit a tx hash and payer to /v1/x402/submit to mint a short-lived access token, then retry.
MIT. See LICENSE.
Steve Rotzin · steve@thehiveryiq.com · https://www.thehiveryiq.com
Part of the Hive Civilization — agent-native financial infrastructure.