# Open data: clinical trials, EU tenders, companies, fuel prices (remote · api.gregswarm.duckdns.org)

Official open data as JSON: clinical trials, EU tenders, papers, apps, French firms, fuel, domains.

- Trust score: 71/100 (medium)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `api.gregswarm.duckdns.org`: 71/100 (this document), [markdown](https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api.md), [page](https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api)

## Channel facts

- Endpoint: `https://api.gregswarm.duckdns.org/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.20261027`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 53/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1794 tokens (~299/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 11/100
  - Stability check failed: schema churn in the 9 days we've observed: 1 tool removals, 0 breaking changes, 0 auth/transport breaks, 1 additions.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Open data: clinical trials, EU tenders, companies, fuel… MCP server?

Open data: clinical trials, EU tenders, companies, fuel… is a hosted endpoint at https://api.gregswarm.duckdns.org/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http org-duckdns-gregswarm-api-open-data 'https://api.gregswarm.duckdns.org/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "org-duckdns-gregswarm-api-open-data": {
      "url": "https://api.gregswarm.duckdns.org/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "org-duckdns-gregswarm-api-open-data": {
      "type": "http",
      "url": "https://api.gregswarm.duckdns.org/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.org-duckdns-gregswarm-api-open-data]
url = "https://api.gregswarm.duckdns.org/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "org-duckdns-gregswarm-api-open-data": {
      "type": "remote",
      "url": "https://api.gregswarm.duckdns.org/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add org-duckdns-gregswarm-api-open-data --url 'https://api.gregswarm.duckdns.org/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  org-duckdns-gregswarm-api-open-data:
    url: "https://api.gregswarm.duckdns.org/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "org-duckdns-gregswarm-api-open-data": {
      "Transport": "http",
      "Url": "https://api.gregswarm.duckdns.org/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add org-duckdns-gregswarm-api-open-data -t streamable-http -u 'https://api.gregswarm.duckdns.org/mcp'
```

### Other

```json
{
  "mcpServers": {
    "org-duckdns-gregswarm-api-open-data": {
      "type": "http",
      "url": "https://api.gregswarm.duckdns.org/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 5 to 8.

### 2026-11-03 (score 70, 0)

- [security] Tool “app-store-search” rewrote its description, which is the text the model reads
- [security] Tool “clinical-trials-monitor” rewrote its description, which is the text the model reads
- [security] Tool “eu-fuel-monitor” rewrote its description, which is the text the model reads
- [security] Tool “fr-company-search” rewrote its description, which is the text the model reads
- [security] Tool “scholarly-search” rewrote its description, which is the text the model reads
- [security] Tool “ted-tender-monitor” rewrote its description, which is the text the model reads

### 2026-11-02 (score 70, −2)

- [security regression] Stability: 0.17 → fail
- [security regression] A breaking change shipped without a version bump: still 1.0.0
- [security regression] Tool “domain-availability” was removed
- [functional improvement] Schema quality: 2027 → 1812

### 2026-10-31 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 70, 0)

- [functional regression] Schema quality: 1578 → 2027
- [functional improvement] Stability: unverified → 0.03
- [functional improvement] Tool “app-store-search” now declares an output schema
- [functional improvement] Tool “clinical-trials-monitor” now declares an output schema
- [functional improvement] Tool “domain-availability” now declares an output schema
- [functional improvement] Tool “eu-fuel-monitor” now declares an output schema
- [functional improvement] Tool “scholarly-search” now declares an output schema
- [functional improvement] Tool “ted-tender-monitor” now declares an output schema
- [functional] First check of Tool coverage: 100
- [functional] New tool “fr-company-search”

### 2026-10-27 (score 70)

First indexed and scored.

## MCP tools (6)

### `app-store-search` (~252 tokens)

App Store App Search (iTunes API): prices, ratings, versions by country

Search Apple's App Store by keyword in any storefront country and get each app's developer, price, rating, version, release date, genre, size, minimum OS and store URL. Read from itunes.apple.com when called. Each result: app_id, name, developer, developer_id, bundle_id, price, formatted_price, currency, average_rating, rating_count, average_rating_current_version, rating_count_current_version, version, version_release_date, release_date, primary_genre, size_bytes, minimum_os, content_rating, seller_name, store_url. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `country` (string): Two-letter App Store country code, which sets the prices, currency and ratings returned. Example: "us".
- `limit` (integer): How many apps to return (Apple allows up to 200 per search). Example: 50.
- `term` (string): Keyword to search for in the App Store (for example budget, photo editor, meditation). Example: "budget".

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

### `clinical-trials-monitor` (~258 tokens)

ClinicalTrials.gov Study Monitor

Studies from the official ClinicalTrials.gov API v2 for a condition, phase and status, returning only the studies whose status, phase, enrollment or last update changed since your last run. Read from clinicaltrials.gov when called. Each result: nct_id, title, sponsor, phase, status, enrollment, start_date, completion_date, last_update_date, conditions, lead_intervention, first_country. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `condition` (string): Disease or condition to follow (for example breast cancer, type 2 diabetes, Alzheimer). Example: "breast cancer".
- `limit` (integer): At most this many results (default 100).
- `phase` (string): Study phase to follow. Example: "PHASE2".
- `status` (string): Recruitment status to follow. Example: "RECRUITING".
- `updated_since` (string): Only studies whose record was last updated on or after this date (YYYY-MM-DD). Example: "2025-01-01".

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

### `eu-fuel-monitor` (~233 tokens)

EU Fuel Price Change Monitor (France, Spain)

Each run returns only the stations whose fuel prices changed since the last run, from the French and Spanish open government feeds, filtered by postcode prefix. Read from donnees.roulez-eco.fr, sedeaplicaciones.minetur.gob.es when called. Each result: country, station_id, postcode, address, city, lat, lon, diesel_eur_l, sp95_e5_eur_l, e10_eur_l, sp98_eur_l. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `country` (array): Which national feeds to read (empty: all). Example: ["FR", "ES"].
- `limit` (integer): At most this many results (default 100).
- `postcode` (string): Keep stations whose postcode starts with this (28 is Madrid in Spain, Eure-et-Loir in France; 75 Paris; empty keeps all). Example: "28".

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

### `fr-company-search` (~446 tokens)

French Company Search (Recherche d'entreprises, Sirene)

Search France's official company register by NAF activity code, département, headcount band and status, and get typed legal-entity records with head-office address, coordinates and company size. Read from recherche-entreprises.api.gouv.fr when called. Each result: siren, siret_head_office, name, legal_name, naf_code, legal_form_code, address, postcode, city, departement, lat, lon, creation_date, headcount_band, company_category, establishments_total, establishments_open, status. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `activite_principale` (string): Main activity code (NAF rev. 2) of the company, e.g. 62.01Z (computer programming), 56.10A (restaurants), 47.11D (supermarkets). Example: "62.01Z".
- `departement` (string): Département code of the head office, e.g. 75 Paris, 69 Rhône, 2A Corse-du-Sud. Leave empty for all of France. Example: "75".
- `etat_administratif` (string): A = active companies, C = ceased companies. Example: "A".
- `limit` (integer): At most this many results (default 100).
- `tranche_effectif_salarie` (string): INSEE headcount band: 00 (0), 01 (1-2), 02 (3-5), 03 (6-9), 11 (10-19), 12 (20-49), 21 (50-99), 22 (100-199), 31 (200-249), 32 (250-499), 41 (500-999), 42 (1000-1999), 51 (2000-4999), 52 (5000-9999),…

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

### `scholarly-search` (~247 tokens)

Scholarly Paper Search (OpenAlex): DOI, year, venue, citations, open-access link

Search the OpenAlex index of scholarly works by keyword, year range and open-access status, and get each paper's title, DOI, year, venue, type, citation count and open-access link. Read from api.openalex.org when called. Each result: openalex_id, title, doi, year, publication_date, venue, type, cited_by_count, is_open_access, oa_status, open_access_url, language. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `limit` (integer): At most this many results (default 100).
- `oa_status` (string): Keep only works with this open-access status (empty: all works). Example: "green".
- `query` (string): Keywords to search for in titles, abstracts and full text. Example: "graph neural networks".
- `year_from` (integer): First publication year to include. Example: 2020.
- `year_to` (integer): Last publication year to include. Example: 2026.

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

### `ted-tender-monitor` (~275 tokens)

EU Public Tender Monitor (TED)

New public procurement notices from the EU's official TED search API for a CPV code prefix, buyer country and keyword, returning only the notices that are new or changed since your last run. Read from api.ted.europa.eu when called. Each result: notice_id, publication_date, buyer, country_code, title, cpv_codes, procedure, deadline, estimated_value, currency, url. Needs a RapidAPI key for this API (https://rapidapi.com/IanGregory/api/clinical-trials-eu-tenders-open-data-api), sent as the X-RapidAPI-Key header; the listing has a free plan.

Input parameters:

- `country` (string): Country of the buying organisation, as a three-letter ISO code. Example: "FRA".
- `cpv_prefix` (string): Start of the CPV code to follow (for example 72 for IT services, 45 for construction, 33 for medical equipment). Example: "72".
- `keyword` (string): Optional word that the notice title must contain. Leave empty to keep all notices. Example: "services".
- `limit` (integer): At most this many results (default 100).
- `published_since` (string): Only notices published on or after this date, written YYYYMMDD. Example: "20250101".

Output parameters:

- `count` (integer): how many results came back
- `fetched_at` (integer): when the source was read (Unix seconds)
- `items` (array): the results, one object each
- `partial` (boolean): some of the source's requests failed: the results are incomplete
- `product` (string)
- `sources` (array): where the data came from: each source's name, licence and the attribution to show with it
- `truncated_from` (integer): the answer was cut to fit: this many results came back in all

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api#diagnostics

## Score history

- 2026-11-05: 71
- 2026-11-04: 71
- 2026-11-03: 70
- 2026-11-02: 70
- 2026-11-01: 72
- 2026-10-31: 72
- 2026-10-30: 71
- 2026-10-29: 71
- 2026-10-28: 70
- 2026-10-27: 70

## Common questions

### What is the Open data: clinical trials, EU tenders, companies, fuel… MCP server?

Open data: clinical trials, EU tenders, companies, fuel… is an MCP server listed in the public MCP registry as org.duckdns.gregswarm.api/open-data. Official open data as JSON: clinical trials, EU tenders, papers, apps, French firms, fuel, domains. This page covers its hosted endpoint (https://api.gregswarm.duckdns.org/mcp).

### Is the Open data: clinical trials, EU tenders, companies, fuel… MCP server safe to use?

Open data: clinical trials, EU tenders, companies, fuel… scores 71 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Open data: clinical trials, EU tenders, companies, fuel… MCP server expose?

Open data: clinical trials, EU tenders, companies, fuel… exposes 6 tools: app-store-search, clinical-trials-monitor, eu-fuel-monitor, fr-company-search, scholarly-search, ted-tender-monitor. Their descriptions and schemas cost roughly 1,711 tokens of context every time the server is loaded.

### Does the Open data: clinical trials, EU tenders, companies, fuel… MCP server require authentication?

No. We connected to Open data: clinical trials, EU tenders, companies, fuel… without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Open data: clinical trials, EU tenders, companies, fuel… MCP server still maintained?

Open data: clinical trials, EU tenders, companies, fuel… is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.gregswarm.duckdns.org/mcp
- Authorisation metadata: https://api.gregswarm.duckdns.org/.well-known/oauth-protected-resource/mcp
- Website: https://swarminc12.github.io/
- Changelog RSS feed: https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api.json
- HTML version of this page: https://verifymcp.io/servers/org-duckdns-gregswarm-api-open-data/api