PostWire412 users asked. We finally shipped dark mode 🌑 But it took 3 weeks — because we rebuilt every single chart from scratch. The details nobody sees = the work that matters most. Drop a 🖤 if you wanted dark mode in your invoicing app #darkmode #saas #buildinpublic #productdesign #indiedev
CoreSpeed or PostWire? Agent infrastructure, or the post itself
CoreSpeed gives an agent one MCP endpoint with your apps, a memory that follows you between agents, media and web tools, spend caps and an activity log. PostWire does the social job end to end: it writes a different native post for each social network from one idea and publishes it on ten networks. They overlap less than their launch pages suggest, and they work together.
Short answer. For getting posts written and published, PostWire publishes on TikTok, Instagram, Facebook Pages, YouTube, LinkedIn, Bluesky, Mastodon, Telegram, Discord and X — CoreSpeed lists publishing on X and LinkedIn — writes each network's version itself, and costs $0.0029 a post on Pro, link included, against $0.25 for an X post with a link on CoreSpeed. Its free plan never expires. And if your agents already run on CoreSpeed, add PostWire inside it as a remote MCP server.
Every CoreSpeed price and feature here was read on CoreSpeed's own pages on Oct 4, 2026, with the links at the bottom. If they changed since, their page wins.
PostWire and CoreSpeed at a glance
| PostWire | CoreSpeed | |
|---|---|---|
| What it is | A social publisher: writes a native post per network from one idea and publishes it, from a dashboard, REST, n8n, Make or MCP | One MCP endpoint for agents: connectors to your apps, team memory, media generation, web search and social-data reading, with spend caps and an activity log |
| Publishes to | 10 networks live: TikTok, Instagram, Facebook Pages, YouTube, LinkedIn (profiles), Bluesky, Mastodon, Telegram, Discord, and X on paid plans. TikTok, Meta and Google reviews passed in July 2026 | X (priced per action) and LinkedIn (named on its marketing page). Its TikTok, Instagram, YouTube, Reddit and Facebook tools read public data; they do not publish |
| Writes the post | Yes — one call writes every network's version inside its limits (hook for TikTok, title and tags for YouTube, under 300 characters for Bluesky) | Your agent writes the text; CoreSpeed carries it (and can generate images, video and audio) |
| Price per post | Pro: $29 a month for 10,000 posts = $0.0029 a post, AI writing included; a link costs nothing extra outside X. Starter: $9 for 1000 | X: 18 credits ($0.018) a post; 250 credits ($0.25) with a link, at 1,000 credits = $1. Pro's $20 includes 10,000 credits = 40 X posts with a link |
| X (Twitter) | Paid plans, X credits: 1 per post, 10 with a link; 150 a month on Pro, then $5 for 80 ($0.0625 a post, $0.625 with a link) | Yes, per action: $0.018 a post, $0.25 with a link |
| Free plan | 1 business, 20 posts a month, 2 networks per post, no card, no time limit; a 7-day Pro trial (card at checkout, nothing charged that day) | 3,000 credits, no card, expire 90 days after signup; no top-ups on Free |
| Paid plans | From $9 a month; 14-day refund | Pro $20 a month (10,000 credits, up to 25 members); top-ups of $5–$1,000 |
| Team | Seats with roles: Starter 3, Pro 25, Agency 100, Scale 500 (Free is the owner alone). Owner, admin, editor, contributor (every post waits for approval), approver (only approves) or viewer, each optionally limited to some brands; every request is checked on the server, and a key acts with the role of the member who created it. Client approvers who approve from a link need no seat | Up to 25 members on Pro ($20 a month) |
| Approval before publishing | Per brand, plain rules checked on the server: hold posts from AI agents, API keys, n8n/Make/Zapier or the dashboard, on some networks only, or only when a post has a link, a price or a listed word. Approve in the dashboard or from a signed, expiring, single-use link (email; optionally the brand's Telegram or Discord); see each network's version, approve some networks, edit, pick a new time or reject with a reason. Client approvers without an account from Pro. An agent cannot approve its own post | Approval policies written in plain English; the action pauses and asks in the dashboard, by email or in Slack |
| Limits and activity log | Per API key and AI app: a monthly post cap, allowed networks and brands, always-needs-approval. Activity log per account with source and X credits, filterable, CSV | Spend caps per API key; a ledger of every action with its cost |
| Sign-in | Google, Apple, or email and a 6-digit code (no password) | Email, Google or Apple |
| Agent setup | One line: set up https://postwire.io/SKILL.md — it ends with your first post live | One line: set up https://corespeed.io/SKILL.md — it ends with the server connected and verified |
| Public status and changelog | /status/ with delivery per network, and /changelog/ | None found (404 on Oct 4, 2026) |
Where PostWire is better than CoreSpeed
- It writes the post. One call writes every network's version inside its limits — a hook for TikTok, a title and tags for YouTube, under 300 characters for Bluesky. With CoreSpeed, the agent you bring writes the text and CoreSpeed carries it.
- Ten networks to publish to. TikTok, Instagram, Facebook Pages, YouTube, LinkedIn, Bluesky, Mastodon, Telegram, Discord and X. CoreSpeed lists publishing on X and LinkedIn; its TikTok, Instagram, YouTube, Reddit and Facebook tools read public data.
- A post with a link for $0.0029 on Pro, the writing included. An X post with a link is 250 credits ($0.25) on CoreSpeed.
- A free plan that does not expire. CoreSpeed's 3,000 signup credits expire 90 days after signup, and Free cannot top up.
- Approvals built for social posts. The approver sees each network's version, approves some networks, edits the text or picks a new time; on Pro a client approves from a signed link without an account, and an agent can never approve its own post.
- A public status page and changelog, with each network's delivery rate over 30 days. CoreSpeed's status and changelog addresses answered 404 on Oct 4, 2026.
Who PostWire is for — and using it inside CoreSpeed
- You want posts written per network and published on TikTok, Instagram, Facebook Pages, YouTube, LinkedIn, Bluesky, Mastodon, Telegram, Discord or X.
- You post often, with links: $0.0029 a post on Pro.
- You want a free plan that does not expire, and a dashboard someone who is not a developer can use.
- Posts must be approved before they go out — by you or a client from a link on the phone, network by network, with edits — and an agent must never approve its own post.
- Your team needs roles: a contributor whose every post waits for approval, an approver who only approves, a viewer, and people limited to some brands (an agency's clients).
- You already use CoreSpeed: add PostWire to it as a remote MCP server and keep both.
Using both. CoreSpeed lets an organization admin add any HTTPS MCP server as a remote connector. Add https://postwire.io/api/mcp with OAuth and each member signs in to their own PostWire; your agents keep CoreSpeed's memory and approvals, and get PostWire's writer and its ten networks. Step by step, for CoreSpeed, Composio and other gateways.
What “writes the post” means
With CoreSpeed, the agent you bring writes the text and CoreSpeed carries it. PostWire writes each network's version first — a hook for TikTok, a searchable title and tags for YouTube, a longer first-person post for LinkedIn — and then publishes them.
The idea: Our invoicing app just shipped dark mode. 412 users asked for it, and it took us 3 weeks because we redid every chart.
Dark Mode is Live 🌑 | Why It Took 3 Weeks to Ship
Dark mode is finally live in our invoicing app — and 412 users asked for it before we built a single pixel. #darkmode What looks like a simple color switch was actually a full 3-week rebuild. Every chart, every data visualization, every graph had to be redesigned from the ground up to work in a dark environment. We weren't going to ship something that half-worked. In this video, we walk you through: — Why dark mode in a data-heavy app is way harder than it sounds — How we prioritized this based on real user requests — The chart redesign process, color contrast decisions, and accessibility checks — What we'd do differently next time If you're building a SaaS product or thinking about shipping dark mode yourself, this one's for you. The stuff users never see is usually the hardest work. #buildinpublic #saasdesign Timestamps: 0:00 — Why 412 people finally convinced us 1:30 — The chart problem nobody warned us about 4:00 — Our redesign process 7:20 — The final result
412 users asked for dark mode. We shipped it last week. Here's the part that surprised us: It took 3 weeks — not because dark mode is hard, but because we have charts. Every chart in our invoicing app had to be rebuilt from scratch. Colors that look clean on a white background? They're invisible or eye-straining on dark. Contrast ratios that pass accessibility standards in light mode? Fail completely in dark. So we didn't just flip a CSS variable and call it done. We redesigned every data visualization. Every axis label. Every tooltip. Every legend. Three weeks of work that most users will never consciously notice — and that's exactly the point. We track feature requests in a dead-simple spreadsheet. When dark mode crossed 400 votes, it jumped straight to the top of the queue. No roadmap committee. No prioritization framework. Just 412 real people saying the same thing. The lesson we keep relearning: Listening to users is easy to say and easy to fake. Actually doing it means sometimes rebuilding things you thought were finished. We think that's the job. If you're building a product right now — how do you decide when a feature request has earned its spot on the roadmap? #BuildInPublic #SaaS #ProductDevelopment
Real output from PostWire's writer on Sept 26, 2026, not edited (23.4 s for six networks; three shown). You review and edit before anything is published.
Publishing, network by network
PostWire's column is what our production setup can publish on Oct 4, 2026. CoreSpeed's is what it lists for publishing on its own pages; reading public data is not counted. "Not listed" means we could not find it there.
| Network | PostWire | CoreSpeed |
|---|---|---|
| TikTok | Live approved Jul 7, 2026 | Not listed |
| Live business/creator | Not listed | |
| Facebook Pages | Live Pages | Not listed |
| YouTube | Live | Not listed |
| LinkedIn profile | Live text posts | Listed (profile or Page not stated) |
| LinkedIn company Page | Not yet | Not listed |
| X | Live paid plans, X credits | Yes |
| Not yet | Not listed | |
| Threads | Not yet | Not listed |
| Not yet | Not listed | |
| Bluesky | Live | Not listed |
| Mastodon | Live | Not listed |
| Telegram | Live | Not listed |
| Discord | Live | Not listed |
Sources, all read on Oct 4, 2026:
- Pricing (plans, credits, X per-action rates): corespeed.io/pricing
- Billing docs (1,000 credits = $1; signup credits expire after 90 days): corespeed.io/docs/billing
- Marketing use case (schedule posts across X and LinkedIn): corespeed.io/for-marketing
- Agent skill (connectors; social tools read public data; memory): corespeed.io/SKILL.md
- Remote MCP servers (add any HTTPS MCP server): corespeed.io/docs/connectors/remote-mcp
- Sign-up page (email, Google, Apple): app.corespeed.io/sign-up
Questions people ask
Is CoreSpeed a social media scheduler?
Not mainly. CoreSpeed is an MCP endpoint that gives agents connected apps, memory, media and web tools, spend caps and an activity log. It publishes on X (priced per action) and names LinkedIn among the apps its marketing use case schedules posts on; its TikTok, Instagram, YouTube, Reddit and Facebook tools read public data. PostWire is a publisher: it writes a native post per network and publishes on ten networks.
How much does a post cost on CoreSpeed compared to PostWire?
On CoreSpeed an X post is 18 credits ($0.018) and an X post with a link 250 credits ($0.25), at 1,000 credits = $1 (its pricing page and billing docs, Oct 4, 2026). On PostWire, Pro is $29 a month for 10,000 posts, $0.0029 a post with the AI writing included, and links cost nothing extra outside X. On X, PostWire uses X credits: 1 a post, 10 with a link, 150 a month included on Pro, then $5 for 80.
Does CoreSpeed's free plan expire?
Its 3,000 signup credits expire 90 days after they are granted, and the Free plan cannot top up. PostWire's free plan (1 business, 20 posts a month, 2 networks per post) has no time limit.
Can I use PostWire inside CoreSpeed?
Yes. CoreSpeed lets an organization admin register any HTTPS MCP server as a remote connector, with OAuth (each member signs in to their own account) or a static bearer key. Register https://postwire.io/api/mcp and PostWire's tools appear in CoreSpeed as org__postwire__… The step-by-step guide: https://postwire.io/guides/postwire-in-corespeed-composio-mcp-gateway/
Does PostWire have approvals like CoreSpeed?
Yes, for social posts. Each brand can hold posts for a person by source (AI agents, API keys, n8n/Make/Zapier, the dashboard), by network, or only when a post has a link, a price or a word from a list. The approver sees every network's version, can approve some networks, edit the text or pick a new time, and approves from the dashboard or a signed, expiring, single-use link; on Pro and above a client approves without a PostWire account. API keys and AI apps can get a monthly post cap and allowed networks and brands, and every account has an activity log with CSV export.
Does PostWire have team seats?
Yes, since October 5, 2026: Starter 3, Pro 25, Agency 100, Scale 500; Free is the owner alone. Members are invited by email (a signed link that works once, for that address) and sign in with their own account; one person can switch between several workspaces. Roles: owner, admin, editor, contributor (every post waits for approval), approver (only the approvals inbox) and viewer, and any of the last four can be limited to some brands. API keys and connected AI apps act with the role of the member who created them. Pro ($29) includes 25 seats, each with a role and, if you want, limited to some brands.
Where is PostWire better than CoreSpeed?
For social posting: it writes each network's version itself, publishes on ten networks (CoreSpeed lists publishing on X and LinkedIn), costs $0.0029 a post with a link on Pro against $0.25 for an X post with a link on CoreSpeed, has a free plan that does not expire, approvals that show each network's version and let a client sign off from a link, and a public status page and changelog.
Type one idea and see the post each network gets.
The demo on the home page writes live, with no account, and never publishes. The free plan covers one business — every network connects free, 2 networks per post — with no card and no time limit. Paid plans have a 14-day refund.
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