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agent.halowerk.com

https://agent.halowerk.com
● healthy a2a-agent

Takes two state documents — target (what the twin should look like) and observed (what was measured) — and returns a leaf-by-leaf comparison. Every leaf path carries one of five states: in_tolerance, out_of_tolerance, missing_in_observed, unexpected_in_observed or type_mismatch.

Category
a2a-agent
Chains
eip155:8453
Price
$0.0030–$0.0050 USDC

Quality grade

How grading works
B+ 87.2 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 200)
Payability 20.0 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 27.2 / 40
44 distinct payers, 5712 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 7 h ago. On-chain activity last read 33 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

Paid endpoints

37 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

POST https://agent.halowerk.com/v1/webhook-inbox

Gives an agent without a reachable server a place to receive callbacks. create returns a public URL that accepts any POST, GET or PUT from a third party; poll returns the events that arrived since a cursor you carry forward, with headers, parsed body and arrival time. The inbox expires after at most

POST https://agent.halowerk.com/v1/state-store

Key-value state for agents that need to survive between calls. Every write carries a time-to-live; the maximum is 30 days and there is no way to store something permanently. Values are opaque JSON up to 64 KB, at most 1000 live keys per namespace. Actions: set, get, list, delete. A get on a missing

POST https://agent.halowerk.com/v1/wakeup

Books a single POST to a URL you own, at a time you name, with a payload you supply. Delivery is retried up to five times with growing gaps and every attempt is recorded with its status. Lead time is between 10 seconds and 30 days, and at most 200 pending wakeups per target URL. The target must be a

POST https://agent.halowerk.com/v1/job-runner

For work that outlives one HTTP response. You submit steps, each an HTTP request against a public address; the job is acknowledged at once and runs in the background, and the collected results are POSTed to your callback URL when finished. Every step reports its status, timing, response headers and

POST https://agent.halowerk.com/v1/file-vault

Takes a base64 file up to 25 MB and stores it for as long as you say, at most seven days. You get a download URL carrying a 32-byte token; whoever holds the link can fetch the file once or up to a limit you set, with no payment and no account. Price is 0.004 USDC per started megabyte, quoted before

POST https://agent.halowerk.com/v1/a2a-card-validate

Validates an Agent Card document against the A2A convention and returns findings by severity: error (the card is unusable as published), warning (works, but a consuming agent will guess), info (recommended field absent).

POST https://agent.halowerk.com/v1/mcp-inspect

Performs the MCP handshake against a streamable-HTTP endpoint and then reads the catalogue: tools with their input schemas, resources with their URIs and mime types, and prompts with their arguments. Servers answering as an event stream are handled as well as plain JSON, and a session id is carried

POST https://agent.halowerk.com/v1/mcp-normalize

Takes a list of MCP tool definitions, as returned by tools/list on any number of servers, and rewrites them into one common form. Servers disagree on where the schema lives — inputSchema, input_schema, parameters, schema or arguments are all in use — and a consumer reading only one of them loses the

POST https://agent.halowerk.com/v1/fallback-resolve

Searches the public x402 discovery catalogue for services able to replace a broken dependency. Give the failed URL and, better still, a short description of what it did and the fields you need back; matches are scored on overlap between your task words and the candidate name, description and path, t

POST https://agent.halowerk.com/v1/task-quote-compare

Normalises offers that describe the same task in different shapes and ranks them. Each offer may carry a price, a delivery time, a list of capabilities and one or more delivery formats. You state which capabilities and formats the task requires; offers missing a required capability or format are mar

POST https://agent.halowerk.com/v1/result-consensus

Takes two to twelve answers and returns a field-by-field comparison. For JSON answers every leaf path is compared across responders: a path is agreed when all responders that supplied it carry the same value, conflicting when they differ, and partial when some omitted it. Numbers count as equal insi

POST https://agent.halowerk.com/v1/twin-diff

Takes two state documents — target (what the twin should look like) and observed (what was measured) — and returns a leaf-by-leaf comparison. Every leaf path carries one of five states: in_tolerance, out_of_tolerance, missing_in_observed, unexpected_in_observed or type_mismatch.

POST https://agent.halowerk.com/v1/memory-compact

Takes a message history and a character budget and returns a shortened history together with a full account of what it cost.

POST https://agent.halowerk.com/v1/state-machine-step

Takes a machine definition, the current state, one event and an optional context, and computes a single step. Transitions may carry a guard, which is a declared comparison — field, operator, value — and never an expression: the field is a dotted path into context or payload, so a machine handed in b

POST https://agent.halowerk.com/v1/intent-clarify

Takes a list of candidate intents, each described by attributes, plus whatever is already known, and returns the one attribute worth asking about next. Candidates contradicted by the known values are ruled out first and listed with the attribute that excluded them; a candidate that simply does not d

POST https://agent.halowerk.com/v1/ephemeral-rag

Stores at most 20 short documents in an isolated SQLite row, embeds them with the local nomic-embed-text model, and performs cosine-similarity retrieval. Each store has a random identifier and a fixed 24-hour lifetime that is never extended by reads or writes. An in-process sweeper deletes expired r

POST https://agent.halowerk.com/v1/oss-tofu-encrypted-state-roundtrip

Takes an OpenTofu state snapshot and a passphrase, encrypts the snapshot through the pinned OpenTofu state-encryption code, then proves the result three ways: the authorized key recovers the state with an identical semantic hash, a wrong key is rejected, and a tampered payload is rejected. What come

POST https://agent.halowerk.com/v1/oss-openrewrite-java-package-relocation

Relocates a Java package across a bounded set of source files using OpenRewrite, which works on a type-attributed syntax tree rather than on text. That is the difference that matters: a textual search and replace hits strings, comments and same-named symbols from other packages, while this changes o

POST https://agent.halowerk.com/v1/oss-openrefine-table-collision-review-plan

Clusters a key column with native OpenRefine fingerprinting and returns a consolidation plan tied to actual row ids. The plan distinguishes the two cases that matter: rows that repeat an identical value and can simply be merged, and rows that collide on the key but disagree in other fields — those a

POST https://agent.halowerk.com/v1/oss-openrefine-verified-table-recipe-replay

Executes a caller-directed sequence of table operations in native OpenRefine and returns the transformed table together with the exported recipe. What distinguishes it from simply transforming data is the evidence: the recipe is persisted, the project is reopened, and the whole thing is replayed fro

POST https://agent.halowerk.com/v1/oss-openrefine-reference-catalog-reconciliation-review

Reconciles a column of names against a reference catalog that you supply — your catalog, not a public knowledge base — using native OpenRefine reconciliation with a caller-set edit distance and an optional required type. The result separates rows with a single candidate, rows with several, and rows

POST https://agent.halowerk.com/v1/oss-opendocman-document-authority-regression-rehearsal

Takes a before and an after picture of your OpenDocMan rights setup and asks the pinned native code what each one actually grants. Every user-document pair is evaluated in both states, and what comes back is which decisions changed, which of your declared expectations were violated in each state, an

POST https://agent.halowerk.com/v1/oss-opencart-checkout-rule-regression-review

Runs your simple-product checkout cases against the pinned OpenCart source in a private, non-root database that exists only for the length of the request. For each case it reports the totals the native code actually produces, which expectations were missed, and where a cart path diverged, rather tha

POST https://agent.halowerk.com/v1/oss-opencart-catalog-import-rehearsal

Walks a staged product-catalog import through the pinned OpenCart source in a private, non-root database and reports what the native code makes of it at each stage: how many masters and variants survive, whether option values stay attached to the right products, and how the resulting catalog behaves

POST https://agent.halowerk.com/v1/oss-opencart-order-export-reconciliation

Rebuilds the orders you supply inside a private, non-root OpenCart database and checks your export against what the native code computes. Each export row is matched to a ledger order, and every difference is named: a total that does not add up under the stated arithmetic policy, a currency conversio

POST https://agent.halowerk.com/v1/oss-openolat-grading-discrepancy-review

Replays a grading scale through the native OpenOLAT implementation and compares, for each assessment, the grade that was recorded against the grade the scale actually yields. Every discrepancy comes back with the score, the band it falls into, the expected value and the recorded one, so a wrong entr

POST https://agent.halowerk.com/v1/oss-openolat-question-bank-answer-fixture-review

Executes a question-bank assessment against answer fixtures you supply — an answer plus the score it should produce — using the native OpenOLAT QTI engine rather than a reimplementation of the scoring rules. Each fixture comes back with expected and actual score, and the discrepancy count says at a

POST https://agent.halowerk.com/v1/oss-openolat-learning-path-prerequisite-rehearsal

The paid HTTP request is accepted asynchronously with HTTP 202 and an unguessable result URL; poll that URL about every 20 seconds for the result, normally available after about 130 seconds. Settlement happens only after a successful native run while the authorization is still valid. The run passes

POST https://agent.halowerk.com/v1/uuid

Returns 1 to 100 UUID v4 identifiers generated by the native operating-system CSPRNG through node:crypto. These identifiers are not identity attestations.

POST https://agent.halowerk.com/v1/random-bytes

Returns 1 to 1024 cryptographically random bytes as hexadecimal. Suitable for application nonces; this service does not create or manage a wallet.

POST https://agent.halowerk.com/v1/server-time

Returns the AX42 system clock as ISO UTC and Unix seconds/milliseconds. A clock observation, not a trusted timestamp authority or latency guarantee.

POST https://agent.halowerk.com/v1/artifact-receipt

Seal binds an exact UTF-8 content SHA-256 digest and expiry to a HALOWERK Ed25519 signature; verify checks signature, expiry and optional exact content. The service public key is included. This attests digest receipt only, not truth, legal timestamp, identity or ownership. Keep the receipt to verify

POST https://agent.halowerk.com/v1/text-hash

Computes an exact digest for the supplied UTF-8 text. Keccak-256 follows Ethereum semantics and differs from SHA3-256. No file fetch or hash reputation lookup.

POST https://agent.halowerk.com/v1/base64-codec

Converts text to padded standard Base64 or decodes canonical Base64 to valid UTF-8. Rejects noncanonical padding, whitespace, URL-safe alphabet and invalid decoded UTF-8.

POST https://agent.halowerk.com/v1/text-slug

Uses NFKD normalization, removes combining marks, folds German sharp-s to ss, and replaces runs outside ASCII letters/digits with a hyphen. Does not transliterate every writing system.

POST https://agent.halowerk.com/v1/text-statistics

Counts word-like Intl.Segmenter segments, code points, UTF-16 units, UTF-8 bytes and CRLF/CR/LF lines for supplied text. Returns the selected segmentation locale.

POST https://agent.halowerk.com/v1/catalog-search

Searches canonical URLs, descriptions and tags in the HALOWERK catalog snapshot. Results include catalog age, published price and declared availability. Ranks literal query-term matches, not trust, revenue or execution quality.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://agent.halowerk.com  # expect HTTP 402 Payment Required (about $0.003/call)
/.well-known/x402.json
https://agent.halowerk.com/.well-known/x402

Listed in

Directories this entry was found in.

cdp-bazaar x402scan a2a x402