Posthell
REMOTE · WWW.POSTHELL.COM
Social media scheduler for AI agents: draft posts into a human-approved queue for 15 networks.
Available components
Last scanned (4 hours ago)
Scores higher than 98% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Marketing and SEO
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. How we score → Why this is hard to score →
Endpoint Security89
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token. See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability70
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1336 tokens (~167/item across 8 items; 8 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 29 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 1058 → 1336 ▼ functional
- New tool “edit_post” functional
- New tool “reschedule_post” functional
- 24 Oct 26 −1
- The server rewrote its instructions, which are the text every model session reads security
- Tool “create_draft” rewrote its description, which is the text the model reads security
- Tool “list_posts” rewrote its description, which is the text the model reads security
- Schema quality: pass → fail ▼ functional
- New tool “get_upload_url” functional
- New tool “list_accounts” functional
- “create_draft” added an optional parameter “accounts” cosmetic
- “create_draft” added an optional parameter “group” cosmetic
- “create_draft” added an optional parameter “media” cosmetic
- “create_draft” added an optional parameter “overrides” cosmetic
- “create_draft” added an optional parameter “platformOptions” cosmetic
- “create_draft” reworded the description of “body” cosmetic
- “create_draft” reworded the description of “platforms” cosmetic
- “create_draft” made “body” optional cosmetic
- 18 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- 10 Oct 26 −1
- The server rewrote its instructions, which are the text every model session reads security
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 14 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://www.posthell.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=www.posthell.com | CN=YR2,O=Let's Encrypt,C=US | 17 Oct 2026 | 15 Jan 2027 | RSA 2048 | SHA256-RSA | 67e83898a81b02957821f93e5491d3602a1 |
| SANs: www.posthell.com | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.posthell.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| posthell.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Challenged, unverified
The endpoint asked for a token, but we could not retrieve and validate the RFC 9728 metadata that tells a client how to obtain one.
| Result | Challenged, unverified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), geolocation=(), browsing-topics=(), microphone=(self) |
Protected resource metadata
| Retrieved | No |
|---|---|
| Problem | no_resource_metadata |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.posthell.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://www.posthell.com/api/mcp | HTTPS enforced | 308 | https://www.posthell.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
create_draft Queue a draft post ~319
Save a post as a DRAFT in the user's posthell queue, with any photos or videos and per-network settings (Instagram Reel cover, YouTube title/tags). Nothing is published by this tool: the user approves it in the dashboard. Optionally propose a publish time. Warnings in the result are what would stop it publishing; fix them by calling again.
| Name | Type | Req | Description |
|---|---|---|---|
| accounts | array | – | Post to these accounts, by handle (e.g. "posthell_bakery") or id from list_accounts. Default: every connected account (narrowed by platforms). |
| body | string | – | The caption. Optional when the post is a photo or video. For YouTube it becomes the description unless overrides.youtube is set. |
| group | string | – | Post to every connected account in this group, by name (e.g. "Bakery"). list_accounts shows the groups. Combine with platforms to send to only some of the group's networks. |
| media | array | – | Photos or videos, in order. One video = an Instagram Reel / a YouTube video. |
| overrides | object | – | A caption of its own for a network, used instead of body there. For YouTube this is the video description. |
| platformOptions | object | – | Settings for each network, keyed by network. Only the networks the post goes to are used. |
| platforms | array | – | Only these networks. |
| proposedTime | string | – | Suggested publish time, ISO 8601. Only a suggestion - pre-fills the user's scheduler. |
No output schema declared.
No examples provided.
edit_post Edit a post's text or time ~151
Change the caption (body), a network's own caption (overrides), and/or the suggested time of a DRAFT. Scheduled posts can only be moved with reschedule_post: changing the text of a post that is already scheduled needs a key the user has allowed to publish. Get the id from list_posts.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | – | New caption for every network that has no caption of its own |
| overrides | object | – | A caption of its own for a network, used instead of body there. For YouTube this is the video description. |
| postId | string | yes | The post id from list_posts |
| scheduledTime | string | – | New time, ISO 8601 with offset |
No output schema declared.
No examples provided.
get_growth Get follower growth ~42
The user's follower counts and 7-day growth per connected network, plus which network is growing fastest. Use this to decide where a post matters most or to report progress.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_upload_url Get a URL to upload a photo or video ~175
Use this to post a file from the user's computer (a video you rendered, a photo). Returns uploadUrl and mediaUrl: PUT the raw file bytes to uploadUrl with its Content-Type header (the curl line in the result does it), then pass mediaUrl in the media list of create_draft or publish_post. Files are stored for good, so a draft keeps its video. Up to 50MB. Types: JPG, PNG, GIF, WebP, MP4, MOV, WebM, or PDF.
| Name | Type | Req | Description |
|---|---|---|---|
| contentType | string | yes | MIME type, e.g. video/mp4, video/quicktime, image/jpeg, image/png |
| filename | string | yes | The file's name, e.g. reel-week-1.mp4 |
| size | integer | yes | File size in bytes |
No output schema declared.
No examples provided.
list_accounts List connected accounts ~82
The user's connected social accounts (id, network, handle), their account groups (a named set, e.g. one business's Instagram + YouTube), and what each network needs: caption limit, whether it needs a photo or video, and the settings it takes. Call this first, then pass a group name or account handles to create_draft or publish_post.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_posts List recent posts ~112
Read the user's recent posts and drafts with per-network status, the live link once a post is up, and the reason when one failed. Published posts include engagement metrics (likes, comments, shares, engagementRate - impressions on plans with full analytics) once analytics have synced. Use it to avoid duplicating a topic AND to learn which topics performed before drafting the next post.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max results (default 15) |
| status | string | – | Filter by status (posted and published are synonyms) |
No output schema declared.
No examples provided.
reschedule_post Move a post to a new time ~107
Change when a post goes out. Works on a post in the calendar (scheduled) and on a draft (its suggested time). Get the id from list_posts. A scheduled post is taken out of the network's queue and queued again at the new time; every network it was going to moves together.
| Name | Type | Req | Description |
|---|---|---|---|
| postId | string | yes | The post id from list_posts |
| scheduledTime | string | yes | New time, ISO 8601 with offset. Must be in the future. |
No output schema declared.
No examples provided.
shape_post Shape notes into post angles ~84
Turn rough notes about what the user did (shipped a feature, fixed a bug, hit a number) into 2-3 finished social-post angles in the user's voice. Grounded only in the notes - never invents facts. Uses one AI generation from the user's monthly quota.
| Name | Type | Req | Description |
|---|---|---|---|
| notes | string | yes | Raw notes about what the user did. Rough is fine. |
No output schema declared.
No examples provided.
How do I install the Posthell MCP server?
Posthell is a hosted endpoint at https://www.posthell.com/api/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.
remote · www.posthell.com
claude mcp add --transport http rohan27s-posthell 'https://www.posthell.com/api/mcp'
What is the Posthell MCP server?
Posthell is an MCP server listed in the public MCP registry as io.github.Rohan27s/posthell. Social media scheduler for AI agents: draft posts into a human-approved queue for 15 networks. This page covers its hosted endpoint (https://www.posthell.com/api/mcp).
Is the Posthell MCP server safe to use?
Posthell scores 90 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 Posthell MCP server expose?
Posthell exposes 8 tools: shape_post, list_accounts, get_upload_url, create_draft, list_posts, and 3 more. Their descriptions and schemas cost roughly 1,072 tokens of context every time the server is loaded.
Does the Posthell MCP server require authentication?
Yes. Posthell asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Posthell MCP server still maintained?
Posthell 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.