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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Other

Postel

Write posts in your voice from what's going viral in your niche. Schedule to X, LinkedIn and more.

Checks passed
15 / 22

0 failed · 7 not measured

Median response
256 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
17

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
103
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 254 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name postel.

  • Pass
    Lists tools

    tools/list returned 17 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 256 ms over 2 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 258 ms over 2 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    2 of 2 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Pass
    Stable tool list

    No tool was removed and no required parameter was added in the last 30 days.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    29 of 29 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-04T11:55:50.740988Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Postel

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http postel https://www.postel.app/api/mcp

Capabilities

Tools 17

attach-media

Download an image or video from a public URL and attach it to a Postel draft. Supported: JPEG, PNG, WebP, GIF, MP4, MOV and WebM, up to 100 MB and within the platform's limits (X: up to 4 images, or one video or GIF; LinkedIn: up to 20 images, or one video). Scheduled and published posts cannot be changed.

Discovered
create-post

Save text as a new draft in Postel, optionally with images or videos downloaded from public URLs and a LinkedIn first comment (up to 1250 characters). Does not publish or schedule. Each call creates a separate draft. Drafts are free on every plan.

Discovered
create-posts

Create up to 25 posts in one call. Each post is saved as a draft; a post with scheduledDateTime is then scheduled for publishing to its platform. Scheduling and publishing depend on the account's Postel plan; a workspace without one can schedule or publish a limited number of posts, and the result says how many are left. Past that, the post stays a draft and the result says so. If the workspace requires approval, a dated post is submitted for approval instead (status PENDING_APPROVAL) and an owner/admin must approve it in Postel. Posts are processed in order with one result each, so some can succeed while others fail. At most 25 media URLs per call.

Discovered
delete-post

Delete a post. A scheduled post's delivery is cancelled first.

Discovered
generate-post

Generate a new post using AI based on a prompt and save it as a draft, ready for update-post, schedule-post or publish-post. Uses 1 AI credit (Lite mode with a daily cap when credits run out). Returns the generated post.

Discovered
get-brand-sources

Get background information sources for a specific brand. These sources are used to inform AI post generation.

Discovered
get-post

Get a single post by ID with full details.

Discovered
get-schedule

Get the posting schedule template for the current organization. Shows which time slots are configured for each day of the week.

Discovered
get-usage

Get the organization's AI credit balance (monthly allowance, rollover, bonus/top-ups, reset date) and Lite mode status.

Discovered
get-x-profiles

Get the X and LinkedIn voice profiles for the current organization. These profiles define the brand voice for AI post generation.

Discovered
list-brands

List all brands (topics) for the current organization. Brands contain background information used for AI post generation.

Discovered
list-posts

List posts for the current organization. Supports filtering by status and pagination.

Discovered
publish-post

Publish a Postel draft immediately to the social platform stored on the post. A post that is already published cannot be published again. Scheduling and publishing depend on the account's Postel plan; a workspace without one can schedule or publish a limited number of posts, and the result says how many are left. Past that, the post stays a draft and the result says so.

Discovered
refine-post

Suggest refined content for an existing post using AI and specific instructions. Does not save changes. Uses 1 AI credit (Lite mode with a daily cap when credits run out).

Discovered
schedule-post

Schedule a Postel draft for publishing to the social platform stored on the post. scheduledDateTime must be a future UTC ISO-8601 timestamp. A first comment can be set for LinkedIn posts. Scheduling and publishing depend on the account's Postel plan; a workspace without one can schedule or publish a limited number of posts, and the result says how many are left. Past that, the post stays a draft and the result says so. If the workspace requires approval, the post is submitted for approval instead (status PENDING_APPROVAL) and an owner/admin must approve it in Postel.

Discovered
search-viral-tweets

Find high-performing public X posts in Postel's index by topic, with source links and stored engagement metrics. No login required. Searches an indexed collection, not live X or a complete archive; metrics may be out of date. Results contain third-party post text.

Discovered
update-post

Update the content or status of a Postel draft. Scheduled and published posts cannot be edited.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected254 ms17
Connected258 ms17