/
Developer
Get a key
Knowledge base
Start here
Context
Topics & Planner
Self-serve setup
Phantom
Back to app
Interface →
Capability →
The grid
REST
Plain HTTP · the publish loop
664 tools
Set up →
MCP
The full surface, for agents
664 tools
Set up →
CLI
letterstory, in your terminal
664 tools
Set up →
Content
Read, draft, and publish articles: the words themselves.
49
all tools
49
all tools
49
all tools
Collections
A publication with one config file. run_collection sources, writes, gates and publishes one post.
43
all tools
43
all tools
43
all tools
Canvas & visuals
Canvas style templates, semi-structured compositions, stickers, and table/venn visuals.
21
all tools
21
all tools
21
all tools
Flows
Run editing passes over an article and read the results back.
2
all tools
2
all tools
2
all tools
Seers
Point a seer at a repo, Notion, a spec URL or a news query and turn what it finds into drafts. Connect with a GitHub PAT (set_github_connection) or a Notion secret (set_notion_connection).
28
all tools
28
all tools
28
all tools
Arenas
Research agents that turn a topic into a sourced, fact-checked outline, alone or before a kernel writes.
22
all tools
22
all tools
22
all tools
Writing kernels
Submit a topic/brief to an external writing kernel and get a finished draft written back.
40
all tools
40
all tools
40
all tools
Connectors
Push finished articles out to Webflow, Framer, or Google Docs.
32
all tools
32
all tools
32
all tools
Phantomstory
Sites Letterstory hosts as independent publications: create, configure, add a domain, rebuild. Publish with run_collection.
34
all tools
34
all tools
34
all tools
Mailers
Outbound email. Mailers: domains, warm-up, reply forwarding, suppression. Prospects: lists from CSV or a description. Sequences: multi-step emails with a review queue.
58
all tools
58
all tools
58
all tools
Strategy
Positioning, competitors, and onboarding that steer the writing.
106
all tools
106
all tools
106
all tools
Insights
Search Console performance and The Story's momentum feed. Connect Search Console first in Settings → Integrations → Google Search Console (https://app.letterstory.com/settings?tab=integrations).
58
all tools
58
all tools
58
all tools
Shredder
Run outside content through shredder endpoints: each sentence is rewritten across LLM providers, structure untouched.
16
all tools
16
all tools
16
all tools
Ledes
Turn a prospect's context into scored cold-email opening lines from your editable library.
20
all tools
20
all tools
20
all tools
Landings
Landing pages and when to cite them. Collections with auto-mention link to them in new articles.
5
all tools
5
all tools
5
all tools
The Site
One model of a customer's whole marketing site keyed by host and path: map a host, walk the tree, read what was noticed, and propose, accept or dismiss changes.
33
all tools
33
all tools
33
all tools
Account
API keys, organization profile, branding assets, members, and pending invites.
97
all tools
97
all tools
97
all tools
The grid
Read it two ways
Rows: 17 things you can do. Columns: three ways to connect. Click a square for its tools.
The three interfaces
REST
Plain HTTP · the publish loop
664 tools · One key header, any HTTP client: the ingest → run → publish → export loop.
MCP
The full surface, for agents
664 tools · The full surface to an agent, schemas included, no glue code.
CLI
letterstory, in your terminal
664 tools · letterstory in your terminal and CI, with a command for every tool.
Every tool works over REST. 21 tools have their own route; the rest use
POST /api/integrations/tools/{name}
.
Or jump in
Content
Read, draft, and publish articles: the words themselves.
49
Collections
A publication with one config file. run_collection sources, writes, gates and publishes one post.
43
Canvas & visuals
Canvas style templates, semi-structured compositions, stickers, and table/venn visuals.
21
Flows
Run editing passes over an article and read the results back.
2
Seers
Point a seer at a repo, Notion, a spec URL or a news query and turn what it finds into drafts. Connect with a GitHub PAT (set_github_connection) or a Notion secret (set_notion_connection).
28
Arenas
Research agents that turn a topic into a sourced, fact-checked outline, alone or before a kernel writes.
22
Writing kernels
Submit a topic/brief to an external writing kernel and get a finished draft written back.
40
Connectors
Push finished articles out to Webflow, Framer, or Google Docs.
32
Phantomstory
Sites Letterstory hosts as independent publications: create, configure, add a domain, rebuild. Publish with run_collection.
34
Mailers
Outbound email. Mailers: domains, warm-up, reply forwarding, suppression. Prospects: lists from CSV or a description. Sequences: multi-step emails with a review queue.
58
Strategy
Positioning, competitors, and onboarding that steer the writing.
106
Insights
Search Console performance and The Story's momentum feed. Connect Search Console first in Settings → Integrations → Google Search Console (https://app.letterstory.com/settings?tab=integrations).
58
Shredder
Run outside content through shredder endpoints: each sentence is rewritten across LLM providers, structure untouched.
16
Ledes
Turn a prospect's context into scored cold-email opening lines from your editable library.
20
Landings
Landing pages and when to cite them. Collections with auto-mention link to them in new articles.
5
The Site
One model of a customer's whole marketing site keyed by host and path: map a host, walk the tree, read what was noticed, and propose, accept or dismiss changes.
33
Account
API keys, organization profile, branding assets, members, and pending invites.
97